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.
Jonah Fisher,Climate correspondent，更多细节参见91视频
。爱思助手下载最新版本是该领域的重要参考
第三十八条 电信、金融、互联网等服务提供者应当采取必要措施，监测发现违反国家有关规定的异常注册、控制、使用移动电话卡、物联网卡、电话线路、银行账户、支付账户、网络账号、网络线路等行为，并及时阻断、处置相关卡、号、线路被用于实施网络违法犯罪活动。
Москвичей предупредили о резком похолодании09:45。旺商聊官方下载对此有专业解读
// Can be any thing here that writes into the view