2. 外语
  3. By and large, married people appear to have better health than their single peers. However, if the marriage ends, that healthy e

By and large, married people appear to have better health than their single peers. However, if the marriage ends, that healthy e

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问题     By and large, married people appear to have better health than their single peers. However, if the marriage ends, that healthy edge tends to disappear, with divorced and separated people reporting one of the highest rates of illness. Now, a new study published in the May issue of the Journal of Marriage and Family shows that co-habitating (同居的) couples also experience a decrease in health after splitting up. "Leaving a co-habitation, like a marriage, tends to have a harmful effect on health," said lead author Dr. Zheng Wu of the University of Victoria in British Columbia, Canada. Wu and his co-author Randy Hart obtained their results from nationwide surveys on physical and mental health and relationship status, conducted by Statistics Canada at 2-year intervals starting in the 1990s.
    There were 9,775 participants, aged 20 to 64 years when the surveys began. Looking at this data, the researchers found that both men and women tend to report a decrease in physical or mental health after ending either a co-habitation or a marriage. Researchers have proposed two theories to explain why married people report better health than non-married people. One supposes that healthier people are more likely to get married, while the other, called the "marriage protection hypothesis", suggests that married couples improve their health by providing each other with social and financial support, and by monitoring each other’s health behaviors. In an interview with Reuters Health, Wu said he tried to understand if either of these hypotheses might explain the health benefits of marriage and co-habitation by analyzing the results in different ways. The authors conclude that "protection effects" may explain much of why married or co-habitating couples experience health gains. The findings also suggest that living together and being married are similar in terms of health benefits gained. "Although there are some differences between marital and non-marital unions, our research suggests that in terms of health outcomes, the two are quite similar," they write. "The finding that co-habitation and marriage share similar health consequences lends acceptance to the notion that co-habitation has become a viable (可行的) form of family living."
What can we know about surveys on physical and mental health and relationship status?
选项 A、They collected national data about marriage.
B、They obtained results from Statistics Canada.
C、They were made by Wu and his co-author Randy Hart.
D、They were conducted every two years since 1990s.
答案D
解析 该句中的conducted．．．at 2-year intervals in the 1990s与D中的every two years since 1990s语义相同，均表示“该研究从20世纪90年代开始，每两年进行一次”，故D为本题答案。
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