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.
而对于更分散、更非标的民宿、农家乐等小微业态，携程则通过“灵活打包”等功能，降低其数字化门槛，推动运营能力向文旅产业供应链的毛细血管渗透。
，详情可参考safew官方版本下载
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