program still runs correctly. If the guess is too small, you get
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。业内人士推荐夫子作为进阶阅读
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.。关于这个话题，搜狗输入法2026提供了深入分析
for each pixel in image