3. 递归：对左右子数组递归执行1-2步
减小尿床的概率，我是这么做的：睡觉前2小时少喝水，睡前要让她上厕所。
。雷电模拟器官方版本下载对此有专业解读
Add a cluster of points in one corner and watch that corner subdivide deeply while the rest of the space stays untouched. Then scatter a few points across the empty region and watch it split only where needed. The tree grows around the data.
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，详情可参考91视频
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第四十五条 下列情形应当按规定预缴税款：