题目内容
Most people who develop Lyme disease, a tick-born infection that’s endemic in parts of the Northeast and Midwest, are easily cured by taking an antibiotic like doxycycline for a couple of weeks. But for years a debate has raged over what to do about patients whose symptoms (fatigue, mental confusion, joint pain) never seem to clear up. One small but vocal group of doctors and patient advocates believes that Lyme’s corkscrew-shaped spirochetes have tunneled deep into their victims’ bodies and can be eradicated only with intensive antibiotic treatment over many months. Another group believes, just as adamantly, that the bacteria are long gone, making further treatment with powerful antibiotics-- which can lead to potentially fatal infections or blood clots--positively dangerous. Now comes word of two studies in the New England Journal of Medicine that show that long-term antibiotic treatment is no better than a placebo for folks with chronic Lyme disease. Originally scheduled for publication in July, the research is part of a group of findings made public last week--just in time for the peak Lyme months of June and July. If confirmed by another major study that’s looking at chronic Lyme and antibiotics from a slightly different perspective, the results would seem to settle the question once and for all. Researchers from Boston, New Haven, Conn., and Valhalla, N.Y., followed 129 patients who had previously been treated for well-documented cases of Lyme disease. Sixty-four were given antibiotics directly into their veins for a month, followed by two months of oral antibiotics. The others received dummy medications. A third of the chronic Lyme patients got better while taking the antibiotics. But so did a third of those on the placebo. Indeed, the results were so similar that a monitoring board decided to cut the trials short rather than add more subjects to the test groups. Unfortunately, the debate over chronic Lyme has become so heated that no one expects the controversy to go away. But both sides may take comfort in the other findings that were released by the New England Journal last week. After studying 482 subjects bitten by deer ticks in a part of New York with a lot of Lyme disease, researchers concluded that a singly 200-mg dose of doxycycline dramatically cut the risk of contracting the disease. That good news is tempered somewhat by the fact that 80% of patients who develop the infection don’t remember ever being bitten by a tick. (The bugs inject an anesthetic into the skin to mask the pain and in their nymph stage are so small--about the size of a poppy seed--that they are easily overlooked. ) There’s still plenty you can do to protect yourself in a Lyme-infested neighborhood: tuck your pants in your socks, spray DEET on your clothing, check yourself and your kids for ticks. And if you develop a spreading red rash--particularly if it’s accompanied by joint pain, chills or confusion--make sure you see a doctor right away. The trick, as always, is to be vigilant without overreacting. As the contest shows, a placebo is ______.
查看答案
搜索结果不匹配？点我反馈
更多问题
Don’t call him just a college professor. Internet entrepreneur, TV personality, advisor to presidents, and friend to the rich and powerful would be more accurate. Henry Louis "Skip" Gates Jr. is better known for his activities outside the academy. This week he sold Africana com, a website he created with a fellow Harvard University professor, to Time Warner. Terms of the deal weren’t revealed, though the Wall Street Journal pegged the price at more than $10 million, with Gates reaping up to $1 million. Time Warner will incorporate the site, a portal with news and information about people of African descent, into America Online when the two merge as expected. The sense is that Gates got a very good deal. The site is a rich source of scholarship but hardly a rich source of revenue. As recently as the late 1980s Gates, who turns 50 this week, was an obscure professor, penning books on literary theory only a graduate student could love. Now he can’t be avoided. He hosted a series about Africa on public television, writes occasional articles for the New Yorker, and even advises the Gore presidential campaign. He counts director Steven Spielberg, Microsoft’s Bill Gates and President Clinton as friends. "They’re not intimate friends," he insists. Indeed, Gates has evolved into a kind of expert on everything African-American. "He remains the go-to person on the state of African-American affairs," said Perry Steinberg, head of American Program Bureau, a lecture agency. The 30 or so speeches Gates delivers each year are another source of income for the professor. With fame comes controversy. Several other black intellectuals have taken him to task for not being confrontational enough. Gates has heard it before. ’"Me Critics Oh, what a shock." But he considers himself more a descendent of historian and educator W. E.B. Du Bois than of Malcolm X. His ultimate goal is to build the field of Afro-American studies. "Fifty years from now I want there to be at least 10 great centers of Afro-American studies," he says. If working as a consultant on Spielberg’s historical film Amistad or giving A1 Gore advice helps, so be it. From Gates’s mention of W. E. B. Du Bois and Malcolm X we can infer that ______.
“给定资料4”中提到，“中国并不缺少文化，但是这种文化更多的还是一种‘东方化，的气质，我们常说，‘只有民族的，才是世界的’，这还需要更长的路要走。”结合给定资料，谈谈你对“只有民族的，才是世界的”这一观点的看法，并分析指出如何才能使中国的传统文化走向世界。 要求：观点明确，分析合理，条理清晰。不超过300字。
Assuming that a constant travel-time budget, geographic constraints and short-term infrastructure constraints persist as fundamental features of global mobility, what long-term results can one expect In high-income regions, (41) North America, our picture suggests that the share of traffic (42) supplied by buses and automobiles will decline as high-speed transport rises sharply. In developing countries, we (43) the strongest increase to be in the shares first for buses and later for automobiles. Globally, these (44) in bus and automobile transport are partially offsetting. In all regions, the share of lowspeed mil transport will probably continue its strongly (45) decline. We expect that throughout the period 1990～2050, the (46) North American will continue to devote most of his or her 1.1-hour travel-time (47) to automobile travel. The very large demand (48) air travel (or high-speed mil travel) that will be manifest in 2050 (49) to only 12 minutes per person a day; a little time goes a long way in the air. In several developing regions, most travel (50) in 2050 will still be devoted to nonmotorized modes. Buses will persist (51) the primary form of motorized transportation in developing countries for decades. (52) important air travel becomes, buses, automobiles and (53) lowspeed trains will surely go on serving vital functions. (54) of the super-rich already commute and shop in aircraft, but average people will continue to spend most of their travel time on the (55) .
Unless we spend money to spot and prevent asteroids (小行星) now, one might crash into Earth and destroy life as we know it, say some scientists. Asteroids are bigger versions of the meteoroids (流星) that race across the night sky. Most orbit the sun far from Earth and don’’t threaten us. But there are also thousands of asteroids whose orbits put them on a collision course with Earth. Buy $ 50 million worth of new telescopes right now. then spend $ 10 million a year for the next 25 years to locate most of the space rocks. By the time we spot a fatal one, the scientists say, we’’ll have a way to change its course. Some scientists favor pushing asteroids off course with nuclear weapons. But the cost wouldn’’t be cheap. Is it worth it Two things experts consider when judging any risk are: 1) How likely the event is; and 2) How bad the consequences if the event occurs. Experts think an asteroid big enough to destroy lots of life might strike Earth once every 500,000 years. Sounds pretty rare — but if one did fall, it would be the end of the world. "If we don’’t take care of these big asteroids, they’’ll take care of us," says one scientist. "It’’s that simple." The cure, though, might be worse than the disease. Do we really want fleets of nuclear weapons sitting around on Earth "The world has less to fear from doomsday (毁灭性的) rocks than from a great nuclear fleet set against them," said a New York Times article. Which of the following best describes the author’’s tone in this passage
微信支付 
支付宝支付