单选题 The reason that the average height of Americans is falling behind that of several Scandinavian countries is that______.

A、 Americans generally receive poorer medical care than those people in the Scandinavian countries
B、 some Americans have inadequate access to medical care and nutrition
C、 the living standards in those Scandinavian countries have greatly improved
D、 the living standard in America has declined with shorter average

【正确答案】 B

【答案解析】细节题。该题问美国人身高落后于斯堪的那维亚国家的原因。答题依据在文章第二部分，具体地说在第二和第三段。第二段说到，儿童缺乏保健医疗卫生和营养。第三段说穷人缺医少药。综合二者，我们可以断定 [B](部分美国人没有足够的医疗和营养)为正确答案。[A]项不合题意，因为讲的是一般情况(generally)，范围太广。[C]和[D]说的都是“生活水准”，涵盖面也太大。而医疗卫生和营养只是生活水准的一个具体的方面。