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自1973年以来，作者在河南省济源县对当地胃癌高发因素进行了长达25年的系统研究。第一阶段，发现当地胃癌高发与饮第三纪岩层间水或第三纪地层及其风化搬运沉积平原区的浅水密切相关。在此基础上，又进行了改善饮水的现场实验流行病学研究。结果表明改水5年后男女两性胃癌分别
Since 1973, the author has conducted a systematic study of high rates of local gastric cancer for 25 years in Jiyuan County, Henan Province. In the first stage, it was found that the high incidence of local gastric cancer is closely related to the drinking of tertiary water in Tertiary Rock or Tertiary strata and the shallow water in the weathered sedimentary plain. On this basis, an on-site experimental epidemiological study on improving drinking water was conducted. The results showed that the gender of women and men after 5 years of water change