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青春期是儿童发育到成年的过渡时期 ,也是生长发育的旺盛时期。为了解城市男生首次遗精情况 ,为学校卫生保健工作提供依据。笔者于 1998年 9～ 11月对德阳市区男生的首次遗精及相关因素进行了调查 ,现将结果报道如下。1 对象与方法1.1 对象 :按分层抽样的方法 ,抽取位于德阳?
Adolescence is the transitional period from child development to adulthood, and is also a period of vigorous growth and development. In order to understand the first spermatorrhea of urban boys, provide the basis for the school health care. The author in 1998 9 ~ November Deyang urban boys first spermatorrhea and related factors were investigated, the results reported below. 1 objects and methods 1.1 object: according to the method of stratified sampling, extraction located in Deyang?