Method s Among 274 families ,808 individuals were surveyed by stratified-clu ster random sampling in the rural area in Wudang town, and an ananlysis was perf ormed about the health status of rural families.

 
  • 方法 :采用分层整群随机抽样方法 ,对武当山镇 2 74户家庭共 80 8个农村居民进行了家庭健康的抽样调查。
今日热词
目录 附录 查词历史