Living Alone Could Be Good for Your Weight Good news for people living alone: A forthcoming paper shows that single adults—o

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问题                 Living Alone Could Be Good for Your Weight
    Good news for people living alone: A forthcoming paper shows that single adults—of any sexual orientation—are physically healthier when it comes to body mass index(BMI). The study,which appears in the January edition of the Journal of Family Issues, found that living without a partner—either divorced or never married—is associated with lower body weight.
    On the other hand, co-habiters and married people, whether male or female, had higher BMIs, a calculation of weight and height that studies have linked to chronic conditions such as diabetes, heart disease, some types of cancers, and, ultimately, higher rates of mortality.
    Sociologist Jay Teachman of Western Washington University used 20 years of data from the 1979 National Longitudinal Study of Youth and more than 3,000 participants to examine body weight, marital status, and what he calls relationship "transitions"—that is, breakups.
    He tracked people’ s BMIs from adolescence to middle age(between 39 and 42 years old)and found people experienced a short-term weight loss after divorce, which he believes is probably stress-induced. Generally,Teachman thinks,couples that live together are heavier because they’ re more likely to share meals and cook together.
    " The divorce effect fades over time," Teachman told Science of US. " But the data show that ’ the appearance effect’ persists. Single people are thinner and likely more concerned about how they look because they are in the dating market. "
    His research is a departure from some of the conventional wisdom that coupled people tend to be fitter—and adds a wrinkle to the numerous links between marriage and positive health outcomes. Nevertheless, Teachman acknowledges a caveat in his work: The difference in body weight between a married and single individual was about three pounds at any point in time. At higher BMIs,a three-pound spread could push the average respondent into the obese category—and the individuals in this study were fairly young. Since the data cut at age 42, people still had a lot of potential weight-gaining decades ahead of them.
People with higher BMIs are easily caught by the following diseases EXCEPT___.

选项 A、metabolic diseases
B、cardiovascular diseases
C、some types of cancers
D、lung diseases

答案D

解析 根据第二段“co—habiters and married people,whether male or female,had higherBMIs…linked to chronic conditions such as diabetes,heart disease,some types of cancers,and,ultimately,higher rates of mortality”可知,同居者和已婚人士,无论男女,身体质量指数都偏高,指数高和糖尿病、心脏病、某些癌症等慢性疾病相关,最重要的是,死亡率也高。糖尿病属于代谢类疾病(metabolic diseases),心脏病属于心血管类疾病(cardiovascu-lar diseases),唯独没有提到肺部疾病。故选D。
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