中山大便出血的原因是什么(中山肛门长一个小肉) (今日更新中)

For the first time in recorded history researchers have not observed sea ice formation along the Siberian Coast of the Arctic Sea this late into the year.The region, according to researchers, usually starts generating thick layers of ice in the later part of September and early parts of October.“It was really hard to find a solid chunk of ice to freeze the ship into,” said Colorado State University researcher Jessie Creamean, who has spent the last six years traveling to the Arctic Sea to study the ice. “It was really astounding that it was so hard to find this thick ice that should be there but isn’t anymore.”In February, Creamean spent time aboard the world’s largest icebreaker ship, Mosaic, and said the changes were visible to the naked eye and not just on satellite imagery.“It’s getting warmer so we’re losing sea ice, but because we lose the sea ice it becomes even warmer,” said Mark Serreze, director of the National Snow and Ice Data Center. “It exacerbates the problem of climate change.”Serreze says the loss of sea ice has started a trend where warmer water from the Atlantic Ocean moves into the Arctic Sea and layers itself under the colder water before permeating to the surface, causing the Arctic Sea to warm at a faster rate.It also allows cargo ships to travel a route that has historically been impassable, creating geopolitical incentives for nations to try and control the region.“We’re seeing issues of tensions between the United States and Russia which, of course, is an Arctic nation starting to arise,” said Serreze. “Russia is strongly militarizing the Artic right now so there are many things that are occurring at that level because of the changes we’re seeing so it’s a great example of how climate change and geopolitics are becoming intertwined.” 1797

Four people in attendance at Republican National Convention events in Charlotte this week have tested positive for COVID-19, according to officials in Mecklenburg County, North Carolina.In its daily release of COVID-19 data, the county said that two attendees and two people support staff members tested positive for the virus. The four people were "immediately issued isolation instructions," and those who had contact with those infected were also told to isolate.About 800 people in town for the RNC were tested for COVID-19, the country reported.While most of the convention was held virtually this year, Charlotte did host a few RNC events in the city this week. The roll call vote was centered in Charlotte, with some delegates submitting their votes virtually. Both President Donald Trump and Vice President Mike Pence gave speeches Monday in front of about 300 delegates at the Charlotte Convention Center.North Carolina has mandated that masks be worn in indoor public spaces, and RNC leaders agreed to enforce the mandate at the convention. However, county health officials reported to the Charlotte Observer that some in attendance were not wearing masks.President Donald Trump delivered his convention speech in front of about 1,000 supporters on the White House lawn on Thursday. Most of those in attendance were not wearing a mask. Politico reports that while those who interacted with President Donald Trump on Thursday were tested for COVID-19 prior to the event, most of those in attendance in the audience were not tested.Mecklenburg County has had more than 24,000 confirmed cases of COVID-19 since the pandemic began. 1645

Former President George H.W. Bush has been discharged from the hospital in Houston he was admitted to last month, according to his spokesman, Jim McGrath."His doctors report he is doing well and is happy to return home," McGrath tweeted Friday.Bush had been admitted for an infection following the death of his wife, former first lady Barbara Bush.The-CNN-Wire 368

Four Americans and a Costa Rican tour guide died Saturday after their recreational rafts overturned on the Naranjo River in Costa Rica.Luis Guzman, a Costan Rican official of the Red Cross, told CNN en Espanol that three rafts carrying 18 people overturned. Thirteen people survived by holding on to the overturned rafts but five were pulled further down the river.Costa Rican officials identified the deceased Americans as Ernesto Sierra, Jorge Caso, Sergio Lorenzo and Andres Dennis. Their ages ranged from 25 to 35. No hometowns were given.The deceased Costa Rican tour guide was identified as Kevin Thompson Reid.Costa Rican President Carlos Alvarado Quesada said on his official Twitter account: "In the name of the Government and people of Costa Rica I would like to express our deepest sorrow for the accident this afternoon at the Naranjo River in Quepos. I would like to thank all the emergency and security teams that worked diligently, and I have instructed authorities to help the victim's families."The Costa Rican Red Cross had 12 rescue workers in the area when the accident happened and assisted in the rescue, the organization posted on social media. 1175

Feel like taking a late night swim in your backyard pool? Finding a giant gator beat you to it is not want you want to see.A homeowner in Sarasota, Florida got the surprise of a lifetime when an 11-foot gator was discovered taking a late Friday night dip on the lanai.Sarasota County sheriff's deputies and a gator trapper were contacted to remove the gator.The gator didn't immediately want to go.After a short struggle, the gator gave up and was taken away quietly.  481

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