Results:The abnormal rate of ECG is remarkably higher in aged group(75.7%) than that in non-aged group(22.9%).

结果：老年高血压患者心电图异常率（ 75 .7% ）显著高于非老年高血压患者（ 2 2 .9% ） ；

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For exploring the reason of non seeking medical services in the aged, a focus group discussing survey was made among old people in Guiyang City.

为进一步探讨老年人未就诊的深层次原因，采用专题小组讨论法，对贵阳市老年人进行了定性研究。

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Methods The survey of prevalence of dental caries in group aged 12 and 15 years in Anhui province was conducted using the non-proportional, stratified, cluster sampling method.

方法对安徽省四县市的12岁及15岁儿童的龋病发病情况进行抽样调查，采用分层、不等比、多阶段整群抽样的方法。

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