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

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.
Teachman’ s conclusion differs from the conventional ideas possibly because______.
选项 A、the participants promised not to increase their weight
B、the relationship between the married and the single is unstable
C、the participants were all under 42 years old
D、the relationship between marriage and health outcomes is doubtful
答案C
解析 全文介绍了Teachman的研究，文章末尾讲到已婚人士与单身人士任何时候的体重差异都是大约3磅，正因为此番参加研究的人员都相当年轻，3磅之差就可以把参与调查者列入肥胖者之列。由于数据截止到42岁，在未来人们体重增长的可能性依旧很大，所以这也是他的研究与传统观念相悖的原因。故选C。
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