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.
This week, check out one of the most critically acclaimed international films of 2025, as Iranian director Jafar Panahi's It Was Just an Accident comes to digital. Winner of the Palme d'Or at this year's Cannes Film Festival, and nominated for four Golden Globes and two Oscars, it's a major awards season contender for good reason. This tale of former political prisoners trying to get revenge on the man they believe to be their former torturer is equal parts darkly funny and a scathing critique of authoritarianism.
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北京蔚来ET7车主王先生的态度颇具代表性：“我知道神玑芯片很厉害，参数很漂亮。但作为车主，我感受到的提升并没有参数那么夸张。日常通勤中，日常通勤中，小鹏的XNGP和蔚来的NOP+在接管率上已经相差无几，我觉得这笔‘技术税’交得有点冤。”
当我满心欢喜体验了亦庄的L4无人出租车，把目的地设置到地铁进站口，但它最后还是把我扔到了天桥对面，害得我最后多走几百米。