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The efficiency depends on the query size relative to the data distribution. A small query in a sparse region prunes almost everything. A query that covers the whole space prunes nothing (because every node overlaps), degenerating to a brute-force scan. The quadtree gives you the most benefit when your queries are spatially local, which is exactly the common case for map applications, game physics, and spatial databases.
（十二）将在办理治安案件过程中获得的个人信息，依法提取、采集的相关信息、样本用于与治安管理、查处犯罪无关的用途，或者出售、提供给其他单位或者个人的；
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The Conservative shadow energy secretary, Claire Coutinho, said barring data centres from the UK "because of domestic net zero targets will do nothing to tackle climate change, but it will make us all poorer".
He noted that tech companies are "already under that duty when it comes to terrorist material so it can be done. It's a known mechanism," adding that "we need to pursue this with the same vigour".，推荐阅读快连下载安装获取更多信息