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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.
与此同时，信息本身也在不断贬值。2025年5月，Graphite研究团队发现，互联网上已有超过一半的内容，是由AI生成的。AI可以基于现有信息进行无限的重组和分发，使信息密度迅速上升，但它却很难提升信息的质量，反而令传播环境变得嘈杂——人们的注意力被更多消耗，也需要更多判断力来防止被虚假和垃圾信息淹没。