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.
警方表示，阿爾巴尼斯於當地時間18:00（格林尼治標準時間07:00）從官邸緊急疏散，並被轉移到另一個地點數小時。
。heLLoword翻译官方下载对此有专业解读
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debut in the UK as Lloyds Bank's "Cashpoint."，详情可参考同城约会