The current epidemic states, epidemic features of endemic fluorine in Enshi mountainous areas were investigated. The reasons were analyzed and the prevention countermeasures were proposed.
调查了恩施山区地方性氟中毒的流行现状、特征，分析了造成污染的原因，提出了氟污染防治措施。
The paper probes into the reasons, characters and countermeasures of prevention and rectification of the social disadvantaged group who gather for making trouble.
本文主要探讨社会性弱势群体聚众闹事的原因、特点及预防处置措施。
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