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.
在头部行业中，半导体业下滑较为明显——在披露研发人员的企业数量增长47.58%的情况下，研发人员增速仅为7.71%，导致平均值的跌幅达到27.02%。叠加研发投入五年增长53.87%，说明该行业的资金优先投向了技术与设备，而非人力扩张。。关于这个话题，服务器推荐提供了深入分析
圖像來源，Serenity Strull/ BBC。51吃瓜对此有专业解读
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