“我忏悔，我自放假回家以来就没打开过书包”“我忏悔，连续三天吃螺蛳粉熏哭室友”“我忏悔，绩点崩盘、实习被拒”……一段段匿名文字，刷屏式的情绪共鸣，深夜里的真诚袒露，让“赛博忏悔室”成为数字时代一个隐秘而柔软的精神角落。
A quadtree does the same thing for two-dimensional space. It takes a rectangular region and divides it into four equal quadrants: northwest, northeast, southwest, southeast. If a quadrant has too many points in it, it subdivides again and again. Each subdivision creates smaller and smaller cells where points are densely packed.，详情可参考搜狗输入法下载
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（二）不属于增值税法第六条规定的情形。。服务器推荐对此有专业解读
Sweat the small stuff