江苏开放式儿科学辅助教学系统(商洛高级全功能护理人模型（带血压测量)) (今日更新中)

The colors of an autumn afternoon can be serene, brilliant and breathtaking.“As the days start getting shorter and the nights get longer, that's the cue that the trees get to change the foliage,” said climate scientist Astrid Caldas.That foliage requires a delicate dance of temperature and moisture to produce fall colors. It’s a dance potentially now in jeopardy due to climate change.“Because these things -- temperature and precipitation, rainfall -- are being affected, changed by climate, then the fall foliage can really get affected,” said Caldas, who is a senior climate scientist at the Union of Concerned Scientists, a nonprofit science organization.She said long-term shifting temperature trends and more rain will be disruptive to fall foliage in certain parts of the country.“We are seeing extreme precipitation increase, particularly in the Northeast and the Midwest,” Caldas said.That precipitation was evident in Minnesota, where people found themselves caught off-guard this year by an unusually early snowfall."I had to completely disassemble my fall leaf clean-up box and make sure my plow is still working,” said Greg Futchi, who is a landscape contractor. “We usually get all the leaves down before we see some snow, but not this year."All of that added moisture can lead to a shorter fall foliage season, Caldas said. Yet, repeated and ongoing droughts, like those seen in the western U.S., also bring their own set of problems to autumn leaves.“When it’s very dry, the colors get a little more muted also,” Caldas said. “So, drought can really kind of change completely the setup.”Scientists add that climate change isn’t just going to affect the ways leaves change their colors during the fall. It’s also going to potentially affect where those trees grow in the first place.“When the conditions start changing --like it's starting to get warmer further and further north--well, that's also a possibility that species are going to start migrating farther north,” Caldas said. “So, as different trees start moving to different areas, then the colors may change because the color depends on the tree.”That may mean having to travel farther north to see stunning red maples. It is a change that will be hard to stop unless action is taken on a global scale.“In the long run, if the countries and the whole world is not committed to really reducing emissions and changing to renewables and making that complete change, then it's going to be very hard for us not to see very drastic changes, because small changes are already happening,” Caldas said.Those changes are now encroaching on a time-honored spectacle, courtesy of Mother Nature. 2667

The first full slate of preseason games kicked off Thursday night, bringing NFL players back into the field for more football and more protests.Several players took a knee, raised fists or did not take to the field while the National Anthem was played before a dozen preseason games began across the country.The Miami Herald reported that Dolphins wide receiver Kenny Stills, along with wide receiver Albert Wilson, knelt during the anthem before a home game against Tampa Bay.WTVJ Miami reported that Dolphins defensive end Robert Quinn raised his fist during the song. 578

The E. coli outbreak linked to romaine lettuce has sickened 43 people in 12 states, the US Food and Drug Administration said Monday.The FDA said that the ongoing outbreak is linked to the "end of season" harvest in some parts of California -- but the agency still says people should not eat any romaine lettuce.People have become sick in California, Connecticut, Illinois, Massachusetts, Maryland, Michigan, New Hampshire, New Jersey, New York, Ohio and Wisconsin.An additional 22 people in Canada are also ill, so the FDA is coordinating its investigation with the Canadian health and food safety authorities, the agency said.When the outbreak was announced last week, the FDA and the Centers for Disease Control and Prevention warned consumers to stay away from all romaine lettuce, but the FDA said the investigation was focused on California and Mexico."Over the Thanksgiving holiday, the FDA continued to investigate the outbreak," according to a statement from FDA Commissioner Dr. Scott Gottlieb. "Our investigation at this point suggests that romaine lettuce associated with the outbreak comes from areas of California that grow romaine lettuce over the summer months, and that the outbreak appears to be related to 'end of season' romaine lettuce harvested from these areas. The involved areas include the Central Coast growing regions of central and northern California."Lettuce growing and harvesting in the winter months is taking place in California and Arizona's desert regions and Florida, as well as Mexico. Currently, the FDA investigation does not implicate lettuce from any of these areas.While the romaine supply undergoes a "clean break" to ensure all the contaminated lettuce is effectively gone from the market, the FDA has asked producers and distributors to provide clear labeling with the lettuce's date and origin in the future.A task force within the lettuce industry has also been established to determine better solutions for labeling long-term in order to help with tracing."Based on discussions with major producers and distributors, romaine lettuce entering the market will now be labeled with a harvest location and a harvest date," Gottlieb said. "Romaine lettuce entering the market can also be labeled as being hydroponically or greenhouse grown. If it does not have this information, you should not eat or use it."If consumers, retailers and food service facilities are unable to identify that romaine lettuce products are not affected -- which means determining that the products were grown outside the California regions that appear to be implicated in the current outbreak investigation -- we urge that these products not be purchased, or if purchased, be discarded or returned to the place of purchase."Symptoms of E. coli infection, which usually begin about three or four days after consuming the bacteria, can include watery or bloody diarrhea, fever, abdominal cramps, nausea and vomiting, according to the CDC. Most people infected by the bacteria get better within five to seven days, though this particular strain of E. coli tends to cause more severe illness.People of all ages are at risk of becoming infected with Shiga toxin-producing E. coli, according to the FDA. Children under 5, adults older than 65 and people with weakened immune systems, such as people with chronic diseases, are more likely to develop severe illness, but even healthy children and adults can become seriously ill. 3450

The CDC is changing their recommendations for travelers, urging them to pay attention to local and state recommendations, and dropping their 14-day quarantine for international or out-of-state travelers.The Centers for Disease Control and Prevention updated their travel requirements Friday, according to multiple media reports. They now advise travelers to "follow state, territorial, tribal and local recommendations or requirements after travel." Previously, the agency recommended a 14-day quarantine for those returning from international destinations or any area with a high concentration of coronavirus cases.The guidelines still urge travelers to limit their risk of infecting others by social distancing and wearing a mask. “You may feel well and not have any symptoms, but you can still spread COVID-19 to others," the CDC states on their website.There are still international travelers who are not allowed to enter the U.S. based on presidential proclamations. Foreign nationals who have spent time in these countries in the last 14 days before travel cannot enter the U.S.: China, Iran, United Kingdom, Ireland, Brazil, and most of Europe. U.S. citizens who travel to these countries can return to the U.S. through 15 airports according to the CDC. 1268

The Cinemark Theater in Towson, Maryland was packed with people who came for what they call the biggest movie of the year, and then they were turned away."I arrived at the theater and they were telling me all of the 'Black Panther' shows were canceled," Miya Henry said.Not what moviegoers who've been waiting months for Marvel's highly anticipated "Black Panther" film wanted to hear."We've been all excited, I took off of work tonight so I'm a little disappointed," Brandie Garland said.Several showings were turned away because of what moviegoers say was a malfunction with the film."There was a long refund line so everyone who purchased a ticket in support of the movie are now getting their money back," Garland said. "Originally when we got to the box office they were saying they were having some difficulties, but they said it wouldn't be an issue they were pretty sure the movie was going to show."But there was an issue according to dozens of tweets we found where Cinemark openly apologized for the inconvenience.We’re very sorry for this inconvenience. Was a theatre manager able to assist with a refund? If not please let us know more at https://t.co/tfn4khl2Bc or call at 1-800-246-3627 so we can further assist. Thank you and we do apologize again.— Cinemark Theatres (@Cinemark) February 16, 2018 1341

来源：资阳报