通过网上的资料，流程见下图 ：
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.
，这一点在谷歌浏览器【最新下载地址】中也有详细论述
Чем старше вы становитесь, тем понятнее, что близких можно потерять в любую секунду. Это заставляет больше ценить совместные мероприятия
For the film, the director asked him to dress up as an admiral. It was for a cameo scene, shaking hands with Hanks when the crew were rescued from the sea.