共用题干 Most Adults in US Have Low Risk of Heart DiseaseMore than 80 percent of...

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问题共用题干 Most Adults in US Have Low Risk of Heart Disease
More than 80 percent of US adults have a less than 10-percent risk of developing heart disease in the next 10 years,according to a report in the Journal of the American College of Cardiology.Just 3 percent have a risk that exceeds 20 percent.
"I hope that these numbers will give physicians,researchers,health policy analysts,and others a better idea of how coronary heart disease is distributed in the US population,"lead author Dr.Earl S.Ford,from the Centers for Disease Control and Prevention in Atlanta,said in a statement.
The findings are based on analysis of data from 13,769 subjects,between 20 and 79 years of age,who narticipated in the Third National Health and Nutrition Examination Survey from 1988 to 1994.
Overall,82 percent of adults had a risk of less than 10 percent,15 percent had a risk that fell between 10 to 20 percent,and 3 percent had a risk above 20 percent.
The proportion of subjects in the highest risk group increased with advancing age,and men were more likely than women to be in this group.By contrast,race or ethnicity had little effect on risk distributions.
Although the report suggests that most adults have a low 10-year risk of heart disease,a large proportion have ahigh or immediate risk,Dr.Daniel S.Berman,from Cedars-Sinai Medical Center in Los Angeles,and Dr.Nathan D.Wong,from the University of California at Irvine,note in a related editorial.
Aggressive treatment measures and public health strategies are needed to shift the overall population risk downward,they add.

选项 The main purpose of the passage is to______. A:introduce that most adults in US adults have low risk of heart disease B:give treatment measures to reduce the risk of developing heart disease for US adults C:describe the research made by the Centers for Disease Control and Prevention D:warn people that they should pay attention to the threat of heart disease immediately

答案 A

解析由文章第四段可知，15%的美国成年人有10%到20%的患心脏病风险几率。
由文章第五段可知，受试者中最具心脏病风险的群体比例会随着年龄的增加而增加，而人种和种族对此几乎无影响。国别在此并未提及。
由文章第三段可知，这些发现是基于从13 769位受试者中得到的数据进行分析的结果，故选B。
文章最后一段中提到，需要有积极的治疗方法和公共卫生策略来降低人口总体的患心脏病风险。
本文的开头便引出了文章论述的主题：More than 80 percent of US adults have a less than10-percent risk of developing heart disease in the next 10 years，之后的内容都围绕此论题展开，故选A。

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共用题干 Most Adults in US Have Low Risk of Heart DiseaseMore than 80 percent of...

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