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The typical picture of a corporate highflier is someone who survives on very little sleep. He or she rises when it is still dark

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问题     The typical picture of a corporate highflier is someone who survives on very little sleep. He or she rises when it is still dark, works late and is still answering emails at two o’ clock in the morning. Such people do exist, of course. The late British Prime Minister Margaret Thatcher, for example, was famous for operating on a few hours’ sleep. Some entrepreneurs and Wall Street traders seem to follow suit.
    But if you think you need to do the same thing to get ahead, think again. A growing body of research is finding that, on the contrary, those who get a good night’ s sleep are usually more productive at work. That’s because sleep doesn’t just rest the brain, say medical specialists. It allows the brain to perform vital maintenance and restoration tasks. Brains that get too little sleep simply cannot perform as well as those that are rested. "There’ s no doubt that sleep deprivation affects job performance," says the Detroit Medical Center’s Safwan Badr. "The evidence is compelling that when you do not get enough sleep ... you are not as productive."
    Investors should also take heed: Numerous studies have found that those running on too little sleep tend to make poorer investment decisions and take needless risks as well. Charles Czeisler, a sleep specialist at Brigham & Women’s Hospital in Boston, agrees. "Missing a night’s sleep degrades our neurobehavioral performance"—that is, our mental acuity—"by the equivalent to being legally drunk," he says. And, he warns, this doesn’t only apply if you miss one night’s sleep com-pletely;you’ 11 see similar effects if you simply sleep too little each night over time.
    For the first time, new research has attempted to put some numbers on the link between more Zzzs and more Benjamins. Matthew Gibson, graduate researcher in the economics department of the University of California, San Diego, compared wage data with sleep times recorded in the U.S. Census Bureau’s American Time Use Survey. His conclusion: For those who are sleeping too little, "a onehour increase in longrun average sleep increases wages by 16%, equivalent to more than a year of schooling."
    Adults need eight hours of sleep on average, experts say. There is some variation between individuals. But when we are tired, we find it much harder to think innovatively and to make creative leaps, say researchers. We find it harder to adapt our thinking to new information or to learn new lessons. Consider: At England’s Loughborough University in 1999, researchers Yvonne Harrison tested the effects of sleep deprivation on a small group of healthy young participants. They were given complex business-situation tasks in the form of a game, as well as some critical reading tasks. Those who went short on sleep were able to keep up with the reading, they found. But when it came to the complex game, "their play collapsed," they Reported.
   
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答案D
解析 根据题干关键词Yvonne Harrison定位到第五段。根据关键词所在句子句首的Consider可知，Yvonne Harrison是对前面观点的例证。转折词But后说明“当我们处于疲劳状态时，我们的思维很难有创新性，也很难做出创新性的举措……”，D项中的lacking sleep，difficult，creative work是文中tired，harder，innovatively，creative等的同义替换，故D项“认为睡眠不足的人很难从事创造性的工作”为正确选项。干扰项B项“认为成年人需要平均8小时的睡眠”是段首专家们的观点。
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