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）。
By now, it's firmly established that modern humans and their Neanderthal relatives met and mated as our ancestors expanded out of Africa, resulting in a substantial amount of Neanderthal DNA scattered throughout our genome. Less widely recognized is that some of the Neanderthal genomes we've seen have pieces of modern human DNA as well.
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从“短平快”转向“中长线”。 当短途东亚目的地卷无可卷时，10天左右的“中航线”，乃至探索东南亚、南太平洋的“长航线”，将成为新的增长点和利润来源。，推荐阅读91视频获取更多信息
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