目的了解城乡蒙汉族中小学女生的经前准备情况，为开展青春期健康教育提供科学依据。
Objective to know the state of pre menstrual preparation of Han and Mongolia secondary and primary school girls and to provide basis for puberty school health education.
方法采用分层整群抽样的方法，对蒙汉族中小学女生6 2 98名进行经前准备情况调查。
Methods a stratified cluster sampling method was used to survey 6 298 girls premenstrual preparations.
分开中小学男生和女生在私立和小范围的教育中已经是一个固定模式。
Separating schoolboys from schoolgirls has long been a staple of private and parochial education.
仫佬族男生与女生的体格发育存在着性别差异。与其他民族中小学生体格发育比较有民族性差异。
The physical development obviously exists discrepant between boys and girls, and also discrepance between Mulao nationality students and other nationality students.
仫佬族男生与女生的体格发育存在着性别差异。与其他民族中小学生体格发育比较有民族性差异。
The physical development obviously exists discrepant between boys and girls, and also discrepance between Mulao nationality students and other nationality students.
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