第二部分:阅读选择(第 11～15 题，每题 2 分，共 10 分)
阅读下面短文，请从短文后所给各题的 4 个选项(A、B、C、 D) 中选出 1 个最佳选项。
Why Lack of Sleep Could Be Making You Fatter Sleepless nights don't just ruin your mood the
next day — they could also damage your waistline. According to new research in the August issue of
the American Journal of Clinical Nutrition, sleep deprivation can cause people to pack on extra pounds.
Researchers at the New York Obesity Nutrition Research Centre at St. Luke's-Roosevelt Hospital
found that sleep-deprived people seem to burn' the same number of calories as the well- rested, but
they consume about 300 more calories a day. Given that it takes just 3,500 calories to add a pound to
your body, those calories can quickly turn into extra weight.
But there are several other reasons that sleep loss could lead to weight gain, says sleep disorder
specialist Michael Breus. When we get too little shut-eye, our metabolism（新陈代谢) slows down to
conserve energy. That slowdown triggers the release of the hormone cortisol (荷尔蒙皮质醇), which
increases appetite. Your body thinks it needs more energy, so it asks for more food.
In a vicious cycle, sleep loss also causes our bodies to release more ghrelin, another hormone
that signals hunger, and less leptin, the hormone that tells your stomach that it's full With your
hormones no longer working in the normal way, your body wants more food and lacks the sensitivity
to know when to stop eating. Not to mention that being awake more hours gives you more time to
snack.
“The later you're up at night, the greater the likelihood that you're going to eat, ” Breus says, and
“you're more likely to eat high-fat, high-carb foods.”
One other contributing factor to such weight gain is that the body burns the most calories during
REM sleep, a deeply restful phase. Less sleep means less time in REM.
For optimal health, experts say you should try to get 7.5 hours of sleep a night. If you have trouble
sleeping, stick to a nightly routine, exercise during the day, banish worries to a journal, and keep prebedtime activities relaxing.
15. To attack sleep troubles, you can __________
A. exercise regularly at night
B.do more pre-bedtime activities
C. keep a journal at night
D. follow a set routine every night
试题答案是D
答案对于A有点质疑，A表示在夜晚运动，文章是白天。 |
考前冲刺
