游憩事故方面，丰富的极限运动资源加剧了游客在东南亚的风险暴露性。由于传统文化和习俗的影响，极限运动类的旅游项目在国内并不常见，已有的极限项目也往往因安全事故或者舆情，普遍运营周期较短。
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Three people have been detained in Belgium as part of a probe into possible crimes against humanity and war crimes in Cameroon linked to the country's secessionist rebellion, Belgian prosecutors say.
2. 分区：小于pivot的放左边，大于的放右边
not.In fact, if we're selecting on a reference to a stream,