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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.
，这一点在体育直播中也有详细论述
备考的那几个月，李婷连洗澡都觉得是浪费时间。但睡眠严重不足带来抵抗力下降，有一段时间她持续发高烧，因为用眼过度，伴随着发烧眼睛也开始流脓，睁不开眼看不了书，脑子还在一遍一遍回忆知识点。
"It's no wonder the government views the future usage of data centres as 'inherently uncertain'," said Mary Stevens, a spokesperson for the group.