2. 不改变已有字段/接口语义
looks kinda weird
。搜狗输入法2026是该领域的重要参考
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.
从连锁率来看，一线市场已达极高水平，上海41.9%、北京36.5%、成都26.4%。同时，五线城市的连锁率也接近20%，这意味着下沉市场中连锁品牌越来越多，但这些品牌大多不是从下沉市场原生成长起来的，而是一二线连锁的复制。
第三十五条 有下列行为之一的，处五日以上十日以下拘留或者一千元以上三千元以下罚款；情节较重的，处十日以上十五日以下拘留，可以并处五千元以下罚款：