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.
At the moment they do not know the long-term consequences of this pollution on the make-up of Earth's atmosphere, but it is unlikely to be good.。业内人士推荐服务器推荐作为进阶阅读
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But after a year and a half of major acts, queues and economic successes, the arena's redemption is well underway.