中山痔疮膏(中山排便肛门处疼痛 有便血) (今日更新中)

Gyms are doing whatever they can to get you back, but many are wondering if it’s safe. A public health expert says it depends on what precautions your gym is taking.“The fact is that the gyms don't spread disease,” said Dr. Jay Wolfson, a public health professor at the University of South Florida. “The people within them who are coming into the gym and not cleaning up after themselves and are not maintaining social distances, and the gym staff, if they're not being attentive and conscientious in terms of disinfecting, are the ones who are aiding a abetting the spread of the disease.”There's evidence showing coronavirus can be spread through aerosol and droplets. Those droplets can float in the air long enough to be inhaled. And they could travel more aggressively when we’re working out.“Just as when you yell and scream, and you'll be sweating, and you'll be hyperventilating sometimes, so those droplet nuclei are going to come out, which means the larger particles are going to rest on some of the equipment as well as in the air,” said Wolfson.Wolfson says it may be hard to monitor gyms across the country because the rules in certain cities and states are different. And it's hard to know if a case is tied to a gym.A Norwegian university looked at whether workout facilities played a role in the spread. It didn't find any cases in people who went to the gym and took proper precautions.Researchers said going to the gym is relatively safe in areas where there aren't many infections. 1509

HARPERS FERRY, W.V. – For more than 2,000 miles, the Appalachian Trail winds its way through more than a dozen states.It’s so-called “psychological midpoint” is the town of Harpers Ferry, West Virginia.“This community represents all the communities up and down the trail,” said Sandy Marra, who heads up the Appalachian Trail Conservancy.Ever since the pandemic began, she said there’s been a noticeable increase in people hiking the trail.“On any given weekday, even in the dead of summer, typically you wouldn't see anyone out on our trails,” Marra said. “And during the week now, you could see dozens and dozens of people just hiking.”That’s something other public lands across the country are seeing, too, in the time of COVID-19 and social distancing.Deborah Williams is with the Outdoor Industry Association, based in Colorado.“We did see a trend of more people exploring the outdoors in March and April and then that really did continue into May and June,” Williams said. “And what we initially saw is a little bit of escapism, in the first few weeks, actually continued.”That outdoor recreation can have a big impact on the economy.In West Virginia, for example, the outdoor industry is responsible for more than 91,000 direct jobs, 0 million in local and state tax revenue and billion in consumer spending.Across the country, it all adds up to 7 billion in consumer spending, supporting 7.6 million jobs.Williams said there’s the potential for that to grow even more in every state across America, in part, because of federal funding from the new “Great American Outdoors Act,” which was just passed by Congress and signed into law by the president.“It will fully fund the land and water conservation fund to the tune of 0 million,” Williams said. “So, this is our country's really flagship mechanism for funding conservation and maintenance of our public lands and waters.”Back at the Appalachian Trail, Sandy Marra hopes people now rediscovering the outdoors take care to protect it, as well.“Because of the pandemic and so many people wanting to get outside, the resource was being overwhelmed,” she said. “This is a great chance for us to reach a whole new audience of people. This is their park, right? So, they get to use it and enjoy it, but they also have a responsibility too.”It's a responsibility that can help future generations experience what’s great about the great outdoors. 2419

Hot weather can increase the risk of natural disasters like droughts and wildfires, now, there is evidence extreme heat can increase harmful chemicals in the air.A study published recently in Science Advances looked at asphalt under different temperature conditions.“A main finding is that asphalt-related products emit substantial and diverse mixtures of organic compounds into the air, with a strong dependence on temperature and other environmental conditions,” says Peeyush Khare, a Yale chemical and environmental engineer and the lead author of the study, in a statement.The researchers took real-world samples of fresh road asphalt and put them in a controlled furnace with purified air. They heated the samples to temperatures between 104 and 392 degrees Fahrenheit, and measured the chemical components in the air.Total emissions nearly doubled when temperatures went from 104 to 140 degrees. At 104 degrees, 94 percent of the emissions measured were hydrocarbons.The group also exposed the asphalt samples to replicated solar heat, including UVA and UVB wavelengths, and found the rate of emission of potentially harmful chemicals increased. Showing that not only heat, but also solar radiation contributed to asphalt producing air pollution.Paved surfaces and roofs make up approximately 45% and 20% of surfaces in U.S. cities, respectively.Asphalt can be quite a bit hotter than the air around it, getting about 40 to 60 degrees warmer than the recorded air temperature.The researchers concluded that while policies and regulations have been put in place about car emissions and other forms of air pollution, asphalt should not be overlooked as a contributor.“It's another important non-combustion source of emissions that contributes to SOA (secondary organic aerosol) production, among a class of sources that scientists in the field are actively working to constrain better,” Drew Gentner, associate professor of chemical & environmental engineering, said. 1983

GRAND JUNCTION, Colo. — The Pine Gulch Fire in Colorado broke a record Thursday evening, becoming the largest wildfire on record in the state.The blaze is now 139,006 acres in size and 77% contained, according to the Rocky Mountain Incident Management Team. 265

HENDERSONVILLE, Tenn. – As COVID-19 cases spike across the country, parents are struggling with whether or not to send their children back to school this fall. There are tools that can help make that decision though, like state-specific modeling data.Courtney Noffsinger of Hendersonville, Tennessee, is among the many parents grappling with this kind of anxiety.The mother of two has spent most of the blistering hot summer social distancing from other family members and friends. She and her husband even recently purchased an RV to go on camping trips, so they wouldn't run the risk of catching COVID-19 from crowded vacation destinations.For Noffsinger, the idea of sending her kids back to school where they’ll be surrounded by hundreds of other students and potentially exposed to the virus is daunting to say the least.“Parenting is already hard, parenting in the middle of a pandemic has been extremely difficult,” Noffsinger said as she watched her daughter scroll through TikTok.Noffsinger’s two kids haven't been to school since March and are both anxious to get back into the classroom. Her 14-year-old son Keagan is entering high school and her 11-year-old daughter Presley is entering middle school. While both children have asked their parents to return to in-person learning, Noffsinger is nervous about sending her kids back to school, especially given her daughter’s underlying asthma.“As their parents, we want to give them what they want, but we’re fearful, especially when the data keeps changing,” she said.As coronavirus cases continue to rise across the country, school districts are being faced with the reality of trying to provide education to the nation’s young people in the midst of the pandemic. While some of the country's largest districts have decided the entire fall semester will be virtual, many other districts are turning to hybrid models where students will attend school at least one or two days of school a week.COVID-19 has created a complex paradox for both parents and educators. They’re weighing the health and safety of students against the prospect of losing valuable learning and social interactions that can't be replicated online.But both parents and teachers are fearful that sending kids back into school environments will give the virus exactly want it wants, crowds of people to spread across.“Parents don’t like to hear me say it, but we will be undertaking a whole series of experiments across this country and we will have to see how those experiments turn out and be prepared to change what we’re doing to keep up with the virus,” said Doctor Williams Schaffner, who serves as a professor of preventive medicine at Vanderbilt University.As COVID-19 cases continue to spike across a large swath of the country, Schaffner says parents need to be vigilant at home when it comes to instilling proper protections like wearing a mask and washing their hands. The more normalized those behaviors are at home, he says, the more likely they’ll be emulated in the classroom. And the less likely it is that the virus will spread.“Model the importance of wearing a mask, practice social distancing. If you do that in your family already, it’ll be easier for your child to understand what’s happening in school,” he said.So, where can parents turn for guidance about whether to send their kids back to school?The Massachusetts Institute of Technology (MIT) has created the COVID-19 Projection Machine, which gives parents an interactive map to work with. As you scroll over each state, you can see current case numbers, hospitalization rates and most importantly, the positivity rate for your state. Health experts say once a state’s positivity rate crosses 5%, parents and school districts should take note.Since the virus is not under control in the United States, Schaffner says parents, students and educators who are returning to in-person learning will need to be flexible as the year progresses.“If there’s an increase in your community and an increase related to the school itself, that school system will have to figure out if there’s a trigger point there, where they call a time out and everyone stays home and the learning becomes virtual,” Schaffner said.As for Noffsinger, she has decided to let both of her children return to school on a hybrid schedule. It’s a decision she’s told them comes with a great deal of responsibility on their part as well.“We’re fearful for their health, but also understand the importance of their education,” she said. 4518

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