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.
It just doesn’t stop someone who understands exactly where the decrypted data has to appear.
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But in a modern twist, before they have even walked into the first room of the city’s new Ukraine Museum inside the bunker, visitors are “targeted” by a Russian drone just before its operator prepares to release the lethal shot, and see themselves in the firing line on the screen of the weapon’s camera.
有了好用的原生功能和强大的 App，最后我们还需要一点点「手头功夫」。不需要学什么构图理论，只要养成这三个微小的习惯，你的出片率可以立马提高。