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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为了隐私，大家往往只能贴上防窥膜，代价是屏幕瞬间暗沉、画质受损，极易让眼睛疲劳。。关于这个话题，im钱包官方下载提供了深入分析
Photograph: Simon Hill，这一点在旺商聊官方下载中也有详细论述