* 核心功能：每次调用next(val)，返回当前价格的跨度（往回数≤当前价格的最大连续天数）
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Specialist online investigator Greg Squire had hit a dead end in his efforts to rescue an abused girl his team had named Lucy.，更多细节参见爱思助手下载最新版本
Because I am deeply concerned about users losing their most sacred data.