重庆市奉节县，一座山水相依的小城。春节前夕，多次来华旅游的英国人詹姆斯从重庆市区乘高铁来到这里，“不到两个小时就能直达，出行很轻松。听说大名鼎鼎的三峡中的瞿塘峡就在这里，我早就想来看看这座宝藏小城。”
Coworking Space
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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.