回到编程。我只有一个建议给你，朋友。
Quadtrees are everywhere spatial data exists. Mapping services use quadtree-like tile pyramids to serve map tiles at different zoom levels (Bing's quadkey system, for example, addresses tiles as base-4 paths). Game engines use them for collision detection and visibility culling. Geographic information systems use spatial indexes to store and query spatial datasets. PostGIS uses GiST indexes (R-tree-style) for spatial queries on geometries, while PostgreSQL's core supports quadtree-like SP-GiST indexes for certain data types like points.
，更多细节参见heLLoword翻译官方下载
Watch: Crowds clash with police after Bolivian plane crash
type=tar,dest=./out.tar — export as a tarball。业内人士推荐谷歌浏览器【最新下载地址】作为进阶阅读
// 右侧第一个 <= cur 的元素, 所以用大于的就弹出
Emer MoreauBusiness reporter。同城约会对此有专业解读