The “Just store the strings”
包括三星、现代等在内的多家科技和跨国公司已召开紧急会议，限制员工前往伊朗及周边局势敏感地区，并准备随时撤离在冲突核心区的人员。
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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.
刘震云：还在想，还没成型，我是比较笨的。但是有一点，我会越写越年轻，我将要写的东西，肯定跟现在完全不一样。