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The quadtree is the two-dimensional case of a broader family of space-partitioning data structures. Octrees extend the same idea to three dimensions (splitting cubes into eight children), KD-trees use alternating axis-aligned splits (splitting along x, then y, then x again), and R-trees group nearby objects into bounding rectangles. Each variant makes different tradeoffs between construction time, query speed, and update cost.
，这一点在heLLoword翻译官方下载中也有详细论述
3014270910http://paper.people.com.cn/rmrb/pc/content/202602/28/content_30142709.htmlhttp://paper.people.com.cn/rmrb/pad/content/202602/28/content_30142709.html11921 我国建成全球规模最大水利基础设施体系。safew官方版本下载是该领域的重要参考
看起来，苹果似乎真的没必要给 MacBook 装上一个触控屏——只是，时代变了。。heLLoword翻译官方下载对此有专业解读