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.
黎智英欺詐案上訴得直：定罪及刑罰被撤銷，出獄時間提前
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Go to worldnews，这一点在im钱包官方下载中也有详细论述
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