Methods Stratified sampling methods were used to carry out the prevalence study of maternity and child care for women at child bearing-age in Luochuan County and Bin County.

 
  • 方法采用分層抽樣,抽取洛川、彬縣育齡婦女入戶(hù)進(jìn)行婦幼保健現狀問(wèn)卷調查。
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