It can be inferred from the first paragraph that ______. [br] The CALERIE study

游客2023-09-03  15

问题 It can be inferred from the first paragraph that ______. [br] The CALERIE study is a turning point in the research field in ______.

选项 A、studying the effect of calorie restriction on human beings instead of animals
B、having subjects with a wide range of age and weight
C、proving the positive effect of calorie restriction on prolonging people’s life
D、excluding the positive effect of obesity reduction on keeping health

答案 D

解析 根据题干a turning point定位到原文第三段第一句a landmark。以往实验把肥胖者作为研究对象,而不是以体重正常的人为研究对象。肥胖能带来很多疾病,减肥自然有助于肥胖者的健康,但这不能说明calorie restriction对健康有利。而CALERIE在这一点上进行了改进,选择正常体重的人作为研究对象,排除了肥胖的干扰,这是这项研究的意义所在,D与之相符。 从第三段第二句可知,以往的实验也以人为研究对象,故排除A;B为无关选项,可直接排除;第四段实验只是证明calorie restriction有助于健康;是否能延长人的寿命不得而知,故排除C。
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