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

游客2024-05-13 30

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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