描述：设计 StockSpanner 类。每次调用 next(price) 时，返回当日价格的「跨度」：从今天往回数，价格 ≤ 今日价格的最大连续天数（含今天）。
Genomic analysis shows that interbreeding between female Neanderthals and human males was less common than the opposite combination.
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The collection, inspired by mythology of the traveller, features natural textures
When financial and geopolitical waves collide
贵在精准，重在精准。我们创造的脱贫奇迹，充分证明了精准方略是减贫的制胜法宝。