目前,农村青年结婚,存在着通婚圈过小的问题。男青年不愿娶远村的姑娘,姑娘也不愿嫁到远村去。据对6个省市的1440个农民家庭调查,绝大多数农村青年的通婚圈不超过25公里,其中不出县的占85%,不出乡的占57%,不出村的占30%。河北省的一个中等村,近年来同村结婚的占结婚总数的70%,这种通婚圈过小的现象,影响了优生,使人口的素质下降。首先,同村人或同乡人结婚,容易使后代发生遗传性疾病。如英国的瑞斯坦岛与周围岛屿较远,岛上的居 At present, rural youth marry, there is a problem of too small a marriage circle. Young men are reluctant to marry a girl from a distant village, and the girl does not want to marry her to a distant village. According to a survey of 1,440 peasant families in six provinces and municipalities, the vast majority of young people in rural areas do not have more than 25 kilometers of inter-marriage circle, of which 85% are out of the county, 57% are out of the countryside, 30% . A medium-sized village in Hebei Province, which married 70% of the total number of marriages in recent years with the same village, this phenomenon of too small a marriage circle has affected eugenics and the quality of the population has been declining. First, marriages with village or fellow countrymen easily lead to genetic diseases in future generations. Such as Britain’s Reithun Islands and the surrounding islands farther, the island’s home