In the United States, 30 percent of the adult population has a "weight problem. " To many people, the cause is obvious: they eat

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问题     In the United States, 30 percent of the adult population has a "weight problem. " To many people, the cause is obvious: they eat too much. But scientific evidence does little to support this idea. Going back to the America of the 1910s, we find that people were thinner than today, yet they ate more food. In those days people worked harder physically, walked more, used machines much less and didn’t watch television.
    Several modern studies, moreover, have shown that fatter people do not eat more on average than thinner people. In fact, some investigations, such as the 1979 study of 3 545 London office workers, report that, on balance, fat people eat less than slimmer people.
    Studies show that slim people are more active than fat people. A study by a research group at Stanford University School of Medicine found the following interesting facts:
    The more the men ran, the more body fat they lost.
    The more they ran, the greater amount of food they ate.
    Thus, those who ran the most ate the most, yet lost the greatest amount of body
In comparison with the adult American population today, the Americans of the 1910s______.

选项 A、ate more food and had more physical activities
B、ate less food but had more activities
C、ate less food and had less physical exercise
D、had more weight problems

答案A

解析 本题考查考生对细节的把握。答案在第一段:Going back to the America of the 1910s,we find that people were thinner than today,yet they ate more food.In those days people worked harder physically, watked more.used machines much less and didn’t watch television.“回顾1910~1919年的美国,我们发现人们比现代人瘦,可是他们吃得更多。在那个时代,人们体力工作更繁重,走路更多,较少使用机器也不看电视。”因此那时的人比现在吃得多,活动多。这句话符合题意,A为正确答案。
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