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.
Researcher: Tom Hunt
。WPS官方版本下载对此有专业解读
有几次，他帮小姐“买钟”后，刚走到夜总会门口，小姐突然谎称身体不舒服，又跑回去赚下一拨客人的钱了。叫妈咪出来理论，妈咪和小姐串通一气。最让他气愤的是，有个妈咪天天打电话到家里骚扰他的家人。朱老板形容后来的小姐既缺钱，也缺感情，经济好了，品格却在降低。
Old Thames barges have been sunk in an estuary to reduce erosion and create a new "island" habitat for birds, in a project the National Trust believes to be the first of its kind in the UK.
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