A case in point is the study by Linda Sax at UCLA, who used data from a large national survey of college freshmen to evaluate the effect of single-sex versus coeducational high schools.

加州大学洛杉矶分校的琳达·萨克斯的研究就是一个恰当的例子，她利用了一项全国性的大一新生调查来评估单性别高中和男女混合高中的效果。

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From a survey about their study, only two percent of the children get good results, while ten percent of them are common and eighty-eight percent of them are poor.

根据一项关于他们研究的调查，只有2%的孩子取得好成绩，而10%的孩子是普通的，88%的孩子取得不理想的成绩。

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In fact, one large recent survey study showed that 23% of patients in a general practice setting reported difficulty swallowing.

事实上，最近一项大型的调查研究显示23%的患者在一般治疗环境中报告吞咽困难。

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For the study, the researchers used the two thousand seven National Survey of Children's Health.

VOA: special.2010.05.06

Part of the research study included a survey of 500 business travellers and executives from the US, United Kingdom, Germany, Brazil and China.

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Berenson reports in the May 2012 issue of Health Affairs on findings from the most recent wave of the Community Tracking Study, a biannual survey of hospital leaders working in large metropolitan areas.

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The findings, published in the New England Journal of Medicine, come from 60, 290 questionnaires filled out by women in the Nurses' Health Study, a survey of more than 121, 000 female registered nurses begun in 1976.

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