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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.
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2026-02-26 00:00:00:03014222910http://paper.people.com.cn/rmrb/pc/content/202602/26/content_30142229.htmlhttp://paper.people.com.cn/rmrb/pad/content/202602/26/content_30142229.html11921 李强出席中德经济顾问委员会座谈会。业内人士推荐旺商聊官方下载作为进阶阅读