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.
"command": "cmdChargeCreditCard",
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82 pairs hit SSIM = 0.999 in at least one font. They break into distinct groups.，更多细节参见雷电模拟器官方版本下载
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