* 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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Less than 40 miles north of San Francisco, the city of Benicia has the quaint ambience of an American small town, where a white gazebo and sign for a community crab bake mark the approach to a vibrant downtown stretch of restaurants, cafes and antique shops.，更多细节参见heLLoword翻译官方下载
Москвичей предупредили о резком похолодании09:45