中山肚子痛便血的原因(中山偶尔一次便血是怎么回事) (今日更新中)

With his pledge to save a major Chinese company from crippling US sanctions, President Donald Trump has delivered yet another twist in the trade clash with Beijing.His announcement on Twitter that he's working to give China's ZTE "a way to get back into business, fast" was a sudden shift in the US stance at the start of a big week for trade ties between the world's top two economies.Washington and Beijing have threatened to impose tariffs on tens of billions of dollars of each other's products, fueling fears of a full-blown trade war.Talks in Beijing earlier this month aimed at dialing down the tensions failed to produce any major breakthroughs. But Chinese President Xi Jinping's top economic adviser is heading to Washington this week for more negotiations. American companies will also have a chance to publicly tell the Trump administration what they think about its planned tariffs on Chinese goods.Here's what to keep an eye on this week. 960

While public health experts have acknowledged the risk for healthy athletes when becoming infected with the coronavirus has been rather low, lingering questions have remained on if the virus causes long-term cardiac damage.Doctors from the Sports and Exercise Cardiology Section of the American College of Cardiology released some of their preliminary findings on the effect the coronavirus has on athletes’ hearts.With college football fully resuming this week with the return of the Pac-12, and college basketball slated to get underway next month, sports are beginning to return to normal amid the pandemic. While some athletes are being frequently tested for the virus, testing alone has not stopped team-wide outbreaks from occurring.Despite there being some limited evidence that the virus causes cardiac injury to athletes, researchers wrote in JAMA that heart damage alone should not be the primary reason to postpone athletic competitions amid the pandemic.“While concerns about the implications of cardiac injury attributable to COVID-19 infection deserve further study, they should not constitute a primary justification for the cancellation or postponement of sports,” the researchers wrote.“Rather than canceling sports because of unsubstantiated concerns about cardiac safety based on limited data of unestablished clinical relevance, this decision should be driven by the need to limit viral spread,” researchers added. “With uncontrolled community transmission, we share concerns with public health officials about risks of increased disease transmission attributable to the resumption of organized sports. Accordingly, the decision to proceed with or delay organized sports should be based on community disease prevalence, coupled with the availability of resources that can be responsibly allocated to identify and prevent new infections among athletes.”The researchers said that initial findings have produced only a handful of cases of cardiac injury, but stressed that more research is needed.“Reports of presumptive myocarditis among several athletes with high profiles have magnified concerns about COVID-19 CV sequelae in athletes,” the researchers wrote. “Our combined experience suggests that most athletes with COVID-19 are asymptomatic to mildly ill, and to date, (return to play) risk stratification has yielded few cases of relevant cardiac pathology. However, we underscore that these observations may not reflect the true prevalence and attendant prognosis of COVID-19 CV involvement in athletes.”As far as what players should do following their 10-day isolation period, assuming they minimal coronavirus symptoms?“We do not advocate for (cardiovascular) risk stratification among athletes who remain completely asymptomatic with prior COVID-19 infection, following completion of US Centers for Disease Control and Prevention (CDC) guided self-isolation,” the researchers wrote. “Given the current lack of published data, consideration of comprehensive screening for this population could be reasonable if it is based on research and data collection.”The Big Ten, which was among several leagues that held out on playing at the start of the football season, requires athletes to undergo cardiovascular screening following a positive coronavirus test. Part of what concerned the Big Ten initially was reports that a number of its athletes who tested positive for the virus had shown myocarditis symptoms.According to the National Institutes of Health, myocarditis is an acute injury that “leads to myocyte damage, which in turn activates the innate and humeral immune system, leading to severe inflammation.”“All COVID-19 positive student-athletes will have to undergo comprehensive cardiac testing to include labs and biomarkers, ECG, Echocardiogram and a Cardiac MRI,” the Big Ten said in a statement. “Following cardiac evaluation, student-athletes must receive clearance from a cardiologist designated by the university for the primary purpose of cardiac clearance for COVID-19 positive student-athletes. The earliest a student-athlete can return to game competition is 21 days following a COVID-19 positive diagnosis. “In addition to the medical protocols approved, the 14 Big Ten institutions will establish a cardiac registry in an effort to examine the effects on COVID-19 positive student-athletes. The registry and associated data will attempt to answer many of the unknowns regarding the cardiac manifestations in COVID-19 positive elite athletes.”To read an abstract of the research, click here. 4546

WILSON, N.C. – The father of a 5-year-old boy who was fatally shot outside his North Carolina home says he cannot understand why someone would want to harm his son.Austin Hinnant told WRAL that his son, Cannon, was playing on his bike in the yard of their Wilson home when he heard a gunshot while inside.Hinnant says he ran outside and found Cannon suffering from a gunshot wound to his head. He scooped his son up in his arms and screamed for someone to help.The father claims he looked up and saw his neighbor, Darius Sessoms, in the yard next door, with a gun in his hand, pacing."I was looking at him as I was picking up Cannon,” Hinnant told WRAL. “I was so full of rage, but I couldn't leave my son's side. I wanted to be with my son."The boy was rushed to an area hospital, where he later died.A warrant was issued for Sessoms and police say he was taken into custody on Monday. The 25-year-old has been charged with 1st degree murder and is being held without bond.Sessoms doesn’t appear to be a stranger to the family. Hinnant says he had Sessoms over for dinner just the night before."I have no idea why he would kill my son in front of his two sisters and his cousin,” Hinnant told WRAL. “I have no idea."Law enforcement has not provided any details regarding a possible motive for Cannon’s murder.A funeral for the little boy was held Thursday. WNCN reports that hundreds gathered at the Shingleton Funeral Home in Wilson to pay their respects, including Cannon’s grandmother, Merrill Race.Race told WNCN that Cannon was “just a kid trying to have fun in his own yard and something like this happens. It’s despicable.”"Everybody just loved Cannon. He lit up the room," said Hinnant, according to WRAL.CNN contributed to this report. 1753

With coronavirus cases surging in Florida, President Donald Trump said Tuesday that he’s “flexible” on the size of the Republican National Convention in Jacksonville.The president spoke as a growing number of Senate Republicans said they’d skip the event, and even as the White House tried to tamp down nationwide concern about the virus’s spread.Asked in an interview Tuesday whether he’d want to limit the gathering if the state’s coronavirus cases continue to rise, Trump replied that the decision “really depends on the timing.”“We’re always looking at different things,” Trump said during an interview on Gray Television’s “Full Court Press with Greta Van Susteren.”“When we signed a few weeks ago, it looked good,” the president continued. “And now, all of a sudden, it’s spiking up a little bit. And that’s going to go down. It really depends on the timing. Look, we’re very flexible.”There were about 452 new reported cases per 100,000 people in Florida over the past two weeks, which ranks second to Arizona in the U.S. for new cases per capita.He spoke as Republican lawmakers increasingly expressed concern about the gathering. Republican Sens. Chuck Grassley of Iowa, 86, and Lamar Alexander of Tennessee, 80, were among those saying they would stay away from the event. The virus takes a high toll on older people.Grassley was explicit about the reason for skipping the convention for the first time in his 40 years in public office.“I’m not going to go, and I’m not going to go because of the virus situation,” he said on a conference call Monday with Iowa reporters.Alexander, who is retiring after this year, was more subtle.In a statement released by his office Tuesday, he acknowledged that choices must be made and that fewer people gathered for the event is desirable. Alexander did not mention Trump, the pandemic or the fact that health experts say the virus is more transmissible among people in close proximity for prolonged periods.“Sen. Alexander is an honorary chair of the Tennessee Trump campaign, but he will not be attending the convention because he believes the delegate spots should be reserved for those who have not had that privilege before as he has had,” the statement said.About a dozen states are reporting worrying spikes of cases. The White House is trying to tamp down the nationwide concern despite more than 2.9 million confirmed COVID-19 cases and more than 130,000 deaths.Trump has falsely declared that 99% of cases of COVID-19 are harmless, a claim that is not supported by science.Florida is one of the nation’s hardest-hit states, and hospitals are warning they’re in danger of being overwhelmed. Florida’s COVID-19 positive test rate is 18.7%, making it second only to Arizona among states where coronavirus infections are surging. According to public health experts, a rate of 10% or more indicates the virus is spreading in communities.The rate is a snapshot of current conditions, and measures like social distancing, wearing masks, avoiding crowded indoor locations and frequent hand-washing can bring it down.Florida reached a grim milestone over the weekend, with health officials reporting that more than 200,000 people have tested positive for the coronavirus since the start of the outbreak.The highest number of confirmed cases in one day came Saturday, when more than 11,400 cases were reported in the state. More than 3,700 people have died.The convention is scheduled to begin Aug. 24. Officials in Jacksonville, Florida, began requiring face masks in public a week ago.“If you want to have a convention, and I think we should have a convention, I think you should do whatever you can to make it as safe as possible, so that would be with face masks and social distancing,” Grassley said.Grassley said he plans to continue his tour of all of Iowa’s counties, visiting 29 counties during the current two-week break. He and his staff will wear masks, but he doesn’t plan on requiring it for Iowans who come to see him.“There’s no way a United States senator can force anybody in Iowa to wear a mask,” he said. “It’s going to be up to the individuals and I would say that there’s generally a rule that if you’re 6 feet apart, you don’t have to wear a mask, but I think doing both makes common sense and I’m going to encourage people to do both.”___Associated Press writers David Pitt in West Des Moines, Iowa, and Ricardo Alonso-Zaldivar in Washington contributed to this report.___Follow Kellman at http://www.twitter.com/APLaurieKellman 4509

West Virginia is a red state, and not just in presidential politics.Just take a look at the "School Closings - At a Glance" map put out by the state Department of Education on its website.The map -- which sports different colors for delayed opens, early dismissals and closings -- is a solid red (for closings) since all 680 public schools in the state's 55 counties are closed because of the ongoing teachers' strike there.West Virginia employs nearly 20,000 classroom teachers in its public schools and has more than 277,000 students enrolled.Teachers hit the picket lines last week, demanding higher wages and better benefits. In 2016, West Virginia ranked 48th in the nation for average teacher salary, according to the National Education Association.Gov. Jim Justice signed legislation Wednesday giving teachers a pay raise, but educators said it wasn't enough and it didn't address other areas of concern like insurance and health care costs, so they went on strike. 990

来源：资阳报