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This is the same idea behind binary search. In a sorted array, you compare against the middle element and eliminate half the remaining candidates. In a quadtree, you choose one of four quadrants and ignore the other three regions. Each level narrows the search space by a factor of four instead of two.
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春节拍照环境往往复杂，我有三招必杀技救急——合照时人脸黑了，别急着删，用「局部」功能在脸上点一下，这是一种更容易上手的蒙版，用两指缩放控制好蒙版覆盖范围，就可以单独调整面部的曝光、色温；
统一管理：适配原有权限治理体系