Regions with many nearby points keep subdividing. Regions with few or no points stay large. The tree adapts to the data: dense areas get fine-grained cells, sparse areas stay coarse. The split grid is predetermined (always at midpoints), but the tree only refines cells that need it. Sparse regions stay as single large nodes while dense regions subdivide deeply.
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这种 “把鸡蛋放一个篮子里” 的玩法，在政策和竞争的双重冲击下，注定不堪一击。
Single dose of potent psychedelic drug could help treat depression, trial shows