徐州怀孕几周做四维号(徐州预约四维彩超多少钱) (今日更新中)

WASHINGTON (AP) — Winter hit U.S. honeybees hard with the highest loss rate yet, an annual survey of beekeepers showed.The annual nationwide survey by the Bee Informed Partnership found 37.7% of honeybee colonies died this past winter, nearly 9 percentage points higher than the average winter loss.The survey of nearly 4,700 beekeepers managing more than 300,000 colonies goes back 13 years and is conducted by bee experts at the University of Maryland, Auburn University and several other colleges.Beekeepers had been seeing fewer winter colony losses in recent years until now, said Maryland's Dennis vanEngelsdorp, president of the bee partnership and co-author of Wednesday's survey."The fact that we suddenly had the worst winter we've had ... is troubling," vanEngelsdorp said.Some bees usually die over winter, but until the past couple decades, when a combination of problems struck colonies, losses rarely exceeded 10%, he said.Bees pollinate billion worth of U.S. food crops. One-third of the human diet comes from pollinators, including native wild bees and other animals, many of which are also in trouble, according to the U.S. Department of Agriculture."We should be concerned on multiple levels," said University of California, Berkeley, agricultural social scientist Jennie Durant, who has a separate study this week on loss of food supply for bees.Year-to-year bee colony losses, which include calculations for summer, were 40.7%, higher than normal, but not a record high, the survey found."The beekeepers are working harder than ever to manage colonies but we still lose 40-50% each year... unacceptable," Swiss bee expert Jeff Pettis, who wasn't part of the survey, said in an email.For more than a decade, bees have been in trouble with scientists blaming mites, diseases, pesticides and loss of food.This past winter's steep drop seems heavily connected to the mites, vanEngelsdorp said. Beekeepers report that chemicals that kill mites don't seem to be working quite as well and mite infestation is worsening, he said. Those mites feed on the bees' fats and that's where the insects store protein and center their immune response.Durant's study in this week's journal Land Use Policy found that changes in food supply in the Midwest's Prairie Pothole Region, a hot spot for honeybee colonies, has been a major factor in losses. That area has lost wetland areas with clover bees feed on.Other areas have been converted to corn and soy crops, which don't feed bees, she said.As bad as the survey numbers are, vanEngelsdorp said, "We're not really worried about honeybees going extinct... I'm more worried that the commercial beekeepers will go out of business." 2695

WELLINGTON, New Zealand (AP) — New Zealand's prime minister says authorities have found four cases of the coronavirus in one Auckland household from an unknown source, the first cases of local transmission in the country in 102 days. Jacinda Ardern says Auckland, the nation’s largest city, will be moved to Alert Level 3 from midday Wednesday through midnight Friday, meaning that people will be asked to stay at home and bars and many other businesses will be closed. “These three days will give us time to assess the situation, gather information, make sure we have widespread contact tracing so we can find out more about how this case arose and make decisions about how to respond to it once we have further information,” Ardern said at a hastily called news conference late Tuesday.She said that traveling into Auckland will be banned unless people live there and are traveling home.She says the rest of the country will be raised to Level 2 over the same time frame. The country has been praised globally for its virus response. 1043

WASHINGTON, D.C. — Unlike in many parts of the world, Election Day in America isn’t a day most people get off from work or school, and it’s not for a lack of trying in the past.“There've been several efforts to make it a holiday, at least for the five previous Congresses, including this one,” said Matthew Weil, who runs The Elections Project at the Bipartisan Policy Center.Those proposed bills to make Election Day a federal holiday have gone nowhere though.Coincidentally, America also has one of the lowest voter participation rates in the developed world, which was about 56 percent in 2016.Over the years, though, some states have made it a state or civic holiday, most recently this year in Illinois and Virginia. In California, state law requires employers to give employees at least two paid hours to vote on Election Day. However, that’s not the case in most places.Weil said whether or not employers need to give you time to vote on Election Day, varies state by state.“In states that don't have robust voting by mail options, or early voting options, Election Day being the only option isn't good,” Weil said. “The good news is the trend has been toward expanding options over the past 10 years.”Those options include early voting, which millions of voters have already done in the 2020 election, including Kevin Jackson in Ohio.“Don’t just wait. Plan your vote,” Jackson said. “Get down here and get it done.”The key to moving forward, experts say, is for all states to offer as many opportunities to vote as possible. Those changes could spread even more now because of the coronavirus pandemic.“I think it's got to be something that we're just not going back to how we used to vote,” said Weil. “I think that this will accelerate changes going forward.”Recently, some high-profile employers like Coca-Cola and Twitter, as well as universities like Brown and American, have decided to give Election Day off to their employees and students, not just so they can vote, but to also encourage them to volunteer as poll workers. 2046

WASHINGTON, D.C. — Unlike in many parts of the world, Election Day in America isn’t a day most people get off from work or school, and it’s not for a lack of trying in the past.“There've been several efforts to make it a holiday, at least for the five previous Congresses, including this one,” said Matthew Weil, who runs The Elections Project at the Bipartisan Policy Center.Those proposed bills to make Election Day a federal holiday have gone nowhere though.Coincidentally, America also has one of the lowest voter participation rates in the developed world, which was about 56 percent in 2016.Over the years, though, some states have made it a state or civic holiday, most recently this year in Illinois and Virginia. In California, state law requires employers to give employees at least two paid hours to vote on Election Day. However, that’s not the case in most places.Weil said whether or not employers need to give you time to vote on Election Day, varies state by state.“In states that don't have robust voting by mail options, or early voting options, Election Day being the only option isn't good,” Weil said. “The good news is the trend has been toward expanding options over the past 10 years.”Those options include early voting, which millions of voters have already done in the 2020 election, including Kevin Jackson in Ohio.“Don’t just wait. Plan your vote,” Jackson said. “Get down here and get it done.”The key to moving forward, experts say, is for all states to offer as many opportunities to vote as possible. Those changes could spread even more now because of the coronavirus pandemic.“I think it's got to be something that we're just not going back to how we used to vote,” said Weil. “I think that this will accelerate changes going forward.”Recently, some high-profile employers like Coca-Cola and Twitter, as well as universities like Brown and American, have decided to give Election Day off to their employees and students, not just so they can vote, but to also encourage them to volunteer as poll workers. 2046

WASHINGTON, D.C. – Dr. Deborah Birx is warning Americans who traveled for Thanksgiving and attended a large gathering that they should assume they were infected with the coronavirus.The coordinator of the White House Coronavirus Task Force is advising those who gathered with numerous loved ones for the holiday to get tested in next few days.“If your family traveled, you have to assume that you are exposed and you became infected and you really need to get tested in the next week and you need to avoid anyone in your family with comorbidities or (who is) over 65,” Birx told “Face the Nation” on Sunday.Birx also says the task force is even asking families to mask indoors if they chose to gather during Thanksgiving and others went across the country or even into the next state.“And if you're over 65 or you have comorbidities and you gathered at Thanksgiving, if you develop any symptoms, you need to be tested immediately because we know that our therapeutics work best, both our antivirals and our monoclonal antibodies, work best very early in disease,” said Birx.During her interview, Birx referred to the current spike in COVID-19 cases as the nation’s “third wave” and compared it to second wave we saw over the summer.“We saw what happened post Memorial Day,” said Birx. “Now we are deeply worried about what could happen post-Thanksgiving because the number of cases, 25,000 versus 180,000 a day, that's why we are deeply concerned.”Birx says she’s worried about how last week’s holiday gatherings may increase the case count even more, especially in states with fewer COVID-19 restrictions. If you live in one of those states, she says you should take it upon yourself to be restrictive.Watch Birx's "Face the Nation" interview below:In step with Birx, Fauci provided similar warnings during an appearance on “Meet the Press” on Sunday. He said the heavy holiday travel could make the current surge in COVID-19 cases even worse as we head into the winter months."What we expect, unfortunately, as we go for the next couple of weeks into December is that we might see a surge superimposed on the surge we are already in," said Fauci.Unless something changes dramatically, Fauci predicts health officials will advise against travel for the end of the year holidays and New Year’s Eve, like they did for Thanksgiving.“We’re going to have to make decisions as a nation, state, city and family, that we’re in a very difficult time and we’re going to have to do the kinds of restrictions of things we would have liked to have done, particularly in this holiday season. Because we’re entering into what’s really a precarious situation, because we’re in the middle of a steep slope.”Watch Fauci's "Meet the Press" interview below: 2746

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