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1990年以来,在呼和浩特某地的6个自然村,查明以特殊皮肤损害为特征的慢性砷中毒病人197例。经用流行病学方法研究,从不同角度分析出,天然富砷水为该病的流行因素。
Since 1990, 197 natural arsenic poisoning patients have been identified in 6 natural villages in a certain area of Hohhot. By epidemiological studies, from different perspectives, natural arsenic-rich water is the epidemic of the disease.