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  3. You feel sad:" I skip my breakfast and supper. I run every morning and evening. What else can I do?" Basically you can do nothin

You feel sad:" I skip my breakfast and supper. I run every morning and evening. What else can I do?" Basically you can do nothin

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问题     You feel sad:" I skip my breakfast and supper. I run every morning and evening. What else can I do?" Basically you can do nothing. Your genes, not your life habits, determine your weight and your body constantly tries to maintain it.
    How can obese(肥胖的) people become normal or even thin through dieting? Well, dieting can be effective, but the health costs are tremendous. Charles Steinmetz, a research physician at Duke University, did a study of ten fat people. They were given liquid formula providing 600 calories a day. After more than 12 weeks, the subjects lost 45 kg on average. But after leaving the hospital, they all regained weight. The results were surprising: by metabolic (新陈代谢的) measurement, fat people who lost large amounts of weight seemed like they were starving. They dreamed of food or breaking their diet. They were anxious and depressed; some were suicidal. They hid food in their rooms. Researchers warn that it is possible that weight reduction doesn’t result in normal wight, but in an abnormal state resembling that of starved non - obese people.
    Thin people, however, suffer from the opposite: they have to make a great effort to gain weight. William Simmons, of Washington State University, got prisoners to volunteer to gain weight. In four to six months, they eat as much as they could. They succeeded in increasing their weight by 20 to 25 percent. But months after the study ended they were back to normal weight and stayed there.
    This does not mean that people are completely without hope in controlling their weight. It means that those who tend to be fat will have to constantly battle their genetic inheritance if they want to significantly lower their weight. The findings also provide evidence for something scientists thought was true—each person has a comfortable wight range (范围) . The range might be as much as 9 kg. Someone might weigh 60 - 89 kg without too much effort. But going above or below the natural weight range is difficult. They body resists by feeling hungry or full and changine the metabolism to push the weight back to the range it seeks.     
What happened to the ten fat people after they left the hospital?
选项 A、They went mad.
B、They killed themselves.
C、They were back to the original weight.
D、They attempted suicide.
答案C
解析 根据文章第二段，离开医院以后，这些肥胖者又反弹到他们的原始体重，可知正确答案选C。
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