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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.，推荐阅读一键获取谷歌浏览器下载获取更多信息
Dynamic antigen expression and cytotoxic T cell resistance in HIV reservoir clones。业内人士推荐WPS官方版本下载作为进阶阅读