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  3. People from around the world flock to the United States expecting to find a better life. But to scientists’ surprise, a growing

People from around the world flock to the United States expecting to find a better life. But to scientists’ surprise, a growing

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问题     People from around the world flock to the United States expecting to find a better life. But to scientists’ surprise, a growing body of evidence indicates that increasing familiarity with U. S. culture and society renders immigrants and their children far more susceptible to many mental and physical ailments, even if they attain financial success.
    The latest study of this phenomenon, directed by epidemiologist William A. Vega of the University of Texas, San Antonio, finds much higher rates of major depression, substance abuse, and other mental disorders in U. S. -born Mexican-Americans compared with both recent and long-standing Mexican-American immigrants. This pattern held regardless of education or income levels.
    Vega’ s results appear at the same time as the release of a national report on declining physical and mental health in children of immigrant families. A panel convened by the National Research Council and the Institute of Medicine, both in Washington, D. C. ,reviewed previous studies and concluded that assimilation into a U. S. lifestyle may undermine the overall health of immigrant children much more than being poor does.
    In contrast, studies of nonimmigrant U. S. residents usually link poverty to poor physical and mental health.
    " The material on immigrant health shocked me when we first reviewed it," says panel member Arthus M Kleinman, a psychiatrist and anthropologist at Harvard Medical School in Boston. " Vega ’ s study is consistent with the panel’ s conclusion that immigrants’ health deteriorates with assimilation to U.S. society, declining toward general U. S. norms. " says Kleinman. Other studies have indicated that citizens of many countries, including Mexico, are healthier overall than U. S. citizens.
    Vega’s team interviewed 3,012 adults of Mexican origin, ages 18-59, living Fresno County, Calif. Of that number, 1,810 people identified themselves as immigrants. Interviews were in English or Spanish. Interviewers expressed an interest in health issues only and tried to minimize any tendency of participants to lie—due to U. S. residency concerns—about having immigrated.
    Nearly one-half of U. S. -born Mexican-Americans had suffered from at least one of 12 psychiatric disorders at some time in their lives, compared with only one-quarter of the immigrants. Common mental conditions in U. S. -born individuals included major depression, phobias and other anxiety disorders, and substance abuse and dependence.
    Prevalence rates for mental disorders were lowest for those who had immigrated within the past 13 years. The higher rates found among immigrants of 13 or more years still fell considerably below those for the native-born group.
Vega’ s team interviewed the immigrants______.
选项 A、for their U. S. residency concerns
B、for their identifications
C、for their health issues
D、all of the above
答案C
解析 第六段最后一句指出Interviewers expressed an interest in health issues，由此可见这个采访是针对健康问题的。
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