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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.。关于这个话题，safew官方版本下载提供了深入分析
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In Pakistan too, gathering verified information from border areas independently is not easy.，推荐阅读服务器推荐获取更多信息
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圖像來源，Serenity Strull/ BBC