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-> [ anyRcv staticPart: anyArg2 anyKeywordPart: anyArg1 ]。关于这个话题，heLLoword翻译官方下载提供了深入分析
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Point lookups are useful, but the operation you'll reach for more often is a range query: give the tree a rectangular region and retrieve every point inside it, without scanning the entire dataset.，这一点在爱思助手下载最新版本中也有详细论述
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