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.
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近年来,春节活动在俄罗斯受到越来越多民众的欢迎和喜爱。今年,莫斯科市连续第三年举办春节系列庆祝活动,圣彼得堡市第十二次在官方层面庆祝春节。马亚茨基表示,对许多俄罗斯民众而言,春节不再是“异域风情”,而是生活的一部分。春节不再停留在书本或宣传册的文字介绍中,而是走进许多俄罗斯家庭。“俄罗斯传统新年也有对团圆、繁荣、富足的期许,这种心灵的共鸣,使得春节对我们来说如此亲切、熟悉。”马亚茨基说。