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.
这种“短平快”的机械化运转，导致产品严重同质化。一旦运力过剩，就只剩下价格战。
。关于这个话题，爱思助手下载最新版本提供了深入分析
efforts. The tool provides a variety of features that can be used to analyze a
「它真的是一份非常詳細的藍圖，」為非營利網站Factcheck.org撰寫過一份詳盡《2025計劃》流程的尤金．凱利（Eugene Kiley）說，「它說明如何開除政府雇員、開除哪些人、以及如何掌控獨立機構。」