作为有着「移动大沙发」美誉的车型，第 15 代轩逸在空间与舒适性上也有改善。
if (n <= 1) return;
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（二）采取预收款方式提供建筑服务；
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.