# user = "pixel" # default
McDonald’s ended a partnership with IBM in 2024 that was testing automated orders at its drive-thrus. The company is now working with Google on AI systems.
，这一点在雷电模拟器官方版本下载中也有详细论述
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.
Node *temp = curr;
Austria GP — Sept. 20