哈密包皮过长手术能多少钱(哈密每个人都要割包皮吗) (今日更新中)

As health experts warn about rising coronavirus cases from spread at indoor gatherings, a new website backed by recent research is trying to help people understand just how many people in what size space is risky for infection. Which could come in handy as some people consider small holiday gatherings.It’s more risky to be in a small room compared to a large gym. If people are calm and quiet, it is safer than singing or exercising no matter how distant they are.Given these types of scenarios, and the “rapidly advancing science” of how COVID-19 droplets behave, scientists at the Massachusetts Institute of Technology created the COVID-19 Indoor Safety Guideline application.Here’s an example:An average suburban house that is 2,000 square feet, with 25 people inside wearing cotton masks and talking in a whisper, can reduce their risk of transmission by only staying inside for 4 hours.If those same 25 people, in the same house, are not wearing a mask and are talking normally, the length of time to reduce transmission drops to just 50 minutes.And if those 25 people, in the same house, are singing along to Christmas music, without masks on, that time to safely reduce COVID-19 transmission indoors drops even further to just 8 minutes.If the size of the gathering is only 5 people, and there is still singing, no mask wearing, and it’s still a 2,000 square foot house, it becomes unsafe after just 27 minutes.The MIT website offers users the ability to select room size, number of people and length of time, then using previous research and scientific knowledge of airborne viruses, it predicts the risk of the indoor event. Users can change elements of the situation, like room size, mask wearing, ventilation, etc.Click here to visit the Indoor Safety Guideline website.In a restaurant, to reduce transmission, 50 people without masks and talking normally should stay for only two hours. If the restaurant has 100 people, to reduce transmission risk, they should only remain inside for 64 minutes.The researchers note current general social distancing guidelines (remain 6 feet apart) suggest 138 people would reduce their risk in the same size of space for an indefinite amount of time.Another example, a Boeing 737, the researchers’ model predicts 100 people can be onboard a 737 wearing masks and still reduce their risk of transmission by staying onboard less than 6 hours.The CDC updated their guidance about COVID-19 this fall, acknowledging ongoing research that shows coronavirus droplets “can remain suspended for many minutes to hours (in the air) and travel far from the source on air currents.”The Centers for Disease Control and Prevention also says coronavirus droplets can remain even when an infected person has left the room and can travel farther than six feet. 2800

Apple is fighting to take back the classroom.The company revealed on Tuesday in Chicago what it believes is the future of education. CEO Tim Cook and his executive team took the stage at Lane Tech High School to discuss "creative new ideas for teachers and students."Apple showed off a new budget iPad specifically targeted toward students. The 9.7-inch device -- the same size as the traditional iPad -- will cost 9.The new iPad works with the Apple Pencil to support art projects — similar to what comes packaged with the higher-end iPad Pro tablet. Apple also teased software features such as smart annotations to help teachers mark up papers, and augmented reality support which will "enable new ways to learn."Alleged leaks of the upcoming iOS 12 software have shown a "ClassKit" platform for developers to create puzzles, tests and lesson plans for students. Augmented reality integration is a good bet, too.Apple's education business has had its ups and downs. iPads and Mac computers were once the primary devices used in American schools. But in recent years, Apple's dominance has slipped. Now, Google's budget-friendly Chromebook laptops occupy nearly 60% of all devices in the classroom, according to research firm Futuresource. Apple devices make up just 17% of the education marketshare.Perhaps it has learned from its mistakes. In 2015, a Los Angeles school district planned to give every student in the city an iPad with preloaded curriculums. Wired reported that the program, which was expected to become a billion deal, fell apart.After a volatile few years, Apple said in 2017 that iPad sales for the classroom ticked up 32% after dropping the price for its entry-level iPad to 9. Apple also made small tweaks to make it easier for students to share in the classroom, such as removing its Apple ID requirement.To get ahead of Apple's news, Google announced on Monday its first tablet running Chrome 10: Acer's Tab 10. At 9 — the same price as the cheapest iPad — Google and Acer hope to bring the flexibility and versatility of the Chrome operating system to an even more portable device.This is Apple's first education-focused keynote in six years — and its second ever. The company hosted a digital textbook launch in New York City in 2012.Chicago is a fitting backdrop for its latest event. The city is home to one of the largest school systems in the United States, and Apple expanded its "Everyone Can Code program" late last year to teach more students its Swift programming language.It's unlikely, however, that Apple will reveal details about its next generation iPhone on Tuesday. But with its annual World Wide Developer Conference only three months away, we may hear some subtle software teases of what will land on iOS and OS soon.  2788

An entire youth football team in Illinois kneeled in protest during the national anthem before their game last weekend.Video of the players from the age 8-and-under Cahokia Quarterback Club football team kneeling during the anthem has gone viral and was met with some backlash online, according to St. Louis's KTVI-TV.Orlando Gooden, the team's coach, told KTVI the protest was the kids' idea and came about when one of them asked him about the protests and riots that have shaken St. Louis in the past week since police officer Jason Stockley was found not guilty in the shooting death of Anthony Lamar Smith. 623

An 8-year-old girl in Florida was seriously injured when a massive tree limb fell on her Monday, as she was playing in a school playground during recess.Patricia Whidden suffered a fractured skull when the limb fell on her, dropping from a live oak at Edward Upthegrove Elementary School in LaBelle."It's an extremely tragic incident, and we are investigating," said Lucinda Kelley, deputy superintendent of Hendry County District Schools.Patricia's aunt Kristi Whidden said her niece has bleeding and swelling of the brain, and is recovering at a hospital in Delray Beach."Right now, she's being kept sedated to give her brain and body a chance to recover," Kristi Whidden said.Live oak trees form a canopy over many schools in Hendry County. Kelley said she believes the limb that fell on Patricia was a freak accident, although the LaBelle area did sustain a lot of damage from Hurricane Irma last fall."The limb that fell did not appear to be, at first glance, related to that," Kelley said. "We are going to ask for the help of an expert arborist to come in and examine all of the trees."In the meantime, the the school district has closed playground where Patricia was hurt. Although sedated, Kristi said her niece did wake up at one point during the night, and was able to respond to questions with a thumbs-up or thumbs-down."Right now, the focus is on Patricia and getting her through this," she said. "A lot of people have sent their prayers and positive vibes."Upthegrove Elementary is organizing a sock hop fundraiser to help Patricia's family with expenses. It will take place on Friday during school hours. 1668

An area of open desert south of Tucson Airport has commonly been referred to as the "Dogpatch." The land has been known to be a dumping ground for trash and dogs, and it has been going on for decades. Angels for Animals is one of many groups that over the years has tried to clean up the Dogpatch.A volunteer with the organization, Jason Gilliam, said that it is an issue that will never go away for good, but it can be managed. "If we make it out here without seeing a dead one, it's a good day." Gilliam says for every weekly visit; they'll find between three to five dead dogs.The Pima County Sheriff's Department says their efforts to stop illegal dog dumping depends on the number of reports they get from people in the area. Deputy James Allerton says as a community, it could be possible to clean up the Dogpatch one day.  877

来源：资阳报