Daofu Tibetan County in Sichuan and Urumchi County of Xinjiang(Kazak) were chosen as two typical areas,the index of integrated assessment(K) were 3.23 and 3.18,both of which belonged to the high-risk areas.

• 饮茶型地方性氟中毒典型地区-四川道孚县(藏族)和新疆乌鲁木齐县(哈萨克族)的综合风险评价指数K分别为3.；23、3