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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.，更多细节参见Line官方版本下载
第二百一十七条 本章规定不适用于下列各项：。快连下载-Letsvpn下载对此有专业解读
1990年，在《滴水穿石的启示》一文中，习近平同志这样写道：，详情可参考WPS官方版本下载