A battle royale.
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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// 易错点3：升序排序 → 逻辑完全错误（无法保证"后车不超车"的前提）
怎样创造政绩？关键靠实干，这是最质朴的方法论，是成就事业的必由之路。