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Exercise is one of the few factors with a positive role in long term mainten
Exercise is one of the few factors with a positive role in long term mainten
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2023-07-30
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问题
Exercise is one of the few factors with a positive role in long term maintenance of body weight. Unfortunately, that message has not gotten through to the average American, who would rather try switching to "light" beer and lowcalorie bread than increase physical exertion. The Centers for Disease Control, for example, found that fewer than onefourth of overweight adults who were trying to shed pounds said they were combining exercise with their diet.
In rejecting exercise, some people may be discouraged too much by caloricexpenditure charts; for example, one would have to briskly walk three miles just to work off the 275 calories in one delicious Danish pastry(小甜饼). Even exercise professionals concede half a point here. "Exercise by itself is a very tough way to lose weight," says York Onnen, program director of the President’s Council on Physical Fitness and Sports.
Still, exercise’s supporting role in weight reduction is vital. A study at the Boston University Medical Center of overweight police officers and other public employees confirmed that those who dieted without exercise regained almost all their old weight, while those who worked exercise into their daily routine maintained their new weight.
If you have been sedentary (极少活动的) and decide to start walking one mile a day, the added exercise could burn an extra 100 calories daily. In a year’s time, assuming no increase in food intake, you could lose ten pounds. By increasing the distance of your walks gradually and making other dietary adjustments, you may lose even more weight. [br] What is the author’s purpose in writing this article?
选项
A、To justify the study of the Boston University Medical Center.
B、To stress the importance of maintaining proper weight.
C、To support the statement made by York Onnen.
D、To show the most effective way to lose weight.
答案
D
解析
主旨题。根据文章在第一句提出的论点“锻炼是能够在长期保持体重方面起积极作用的为数不多的因素之一”,第一、二自然段中对“想不锻炼就减肥”的错误观点的反驳,以及第三、四段中针对主题句“锻炼对于减肥的辅助作用是至关重要的”提出的论据。我们发现,本文的主要目的是“为了指出减肥的最有效的方法”,即选项D)。
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