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.
台辉高速：浚县东站-万仙山站。
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这种心理结构，为众多原生宠物品牌提供了明确的切入口。