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1·DESIGN: Cluster sampling and stratified analysis.

设计：整群抽样，分层分析。

2·Method cluster sampling and cross sectional study.

方法整群抽样，横断面调查。

3·Methods Randomly cluster sampling method was applied.

方法采用整群随机抽样调查方法。

4·DESIGN: Cluster sampling and cross-sectional investigation.

设计：整群抽样，横断面调查。

5·DESIGN: Randomized cluster sampling, cross-sectional study.

设计：随机整群抽样，横断面调查。

6·DESIGN: a stratified random cluster sampling investigation.

设计：分层整群抽样调查。

7·DESIGN: a cluster sampling and simple randomized sampling survey.

设计：整群抽样与单纯随机抽样。

8·DESIGN: Random cluster sampling methods and a cross-section survey.

设计：随机整群抽样，横断面调查。

9·Methods: Data were collected with the method of hospital-based cluster sampling.

方法采用以医院为基础的监测方法收集资料。

10·Methods: To applied cluster sampling method interview all the village health workers.

方法：采取整群抽样，对安宁市村级卫生服务提供者进行调查。