Do a second pass to clean up the code/comments and make further optimizations
RAM = 4GB（建议 8GB+），详情可参考同城约会
，这一点在同城约会中也有详细论述
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This put me in mind of a recent New Yorker article by the anthropologist Manvir Singh. The article is about the efforts of linguists and folklorists to reconstruct the Proto-Indo-European mythology which links folk tales and gods from India to Ireland. The serpent-slaying storm god, the Sky Father, the Divine Twins: these figures mutated and multiplied across cultures but retained their essential forms.，这一点在heLLoword翻译官方下载中也有详细论述
* 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）