1、Methods The study was performed by systematic and cluster sampling and questionnaire.
方法采用系統整群抽樣的方法，以填寫調查表的形式進行問卷調查。

2、DESIGN: a stratified random cluster sampling investigation.
設計：分層整群抽樣調查。

3、Multistage stratified cluster sampling method was used for the sampling.
采用多階段整群分層抽樣方法。

4、Methods: To applied cluster sampling method interview all the village health workers.
方法：采取整群抽樣，對安寧市村級衛(wèi)生服務提供者進行調查。

5、DESIGN: Cluster sampling and stratified analysis.
設計：整群抽樣，分層分析。

6、Methods: Stratified random cluster sampling method was used to determine the survey sample.
方法：以分層隨機整群抽樣的方法，確定調查樣本。

7、Methods. The survey was conducted according to multi-stage stratified cluster sampling method.
方法：分階段分層整群隨機抽樣調查。

8、DESIGN: Cluster sampling and cross-sectional investigation.
設計：整群抽樣，橫斷面調查。

9、Methods Questionnaire and multistage stratified cluster sampling method were used for the survey.
方法進行問卷調查；采用多階段整群分層抽樣方法。

10、Method cluster sampling and cross sectional study.
方法整群抽樣，橫斷面調查。

cluster sampling翻譯