The pruned nodes (in red) represent entire regions of space that the algorithm never examines. The points inside those regions are never checked. Compare the "Nodes Visited" count to the total number of points. The quadtree is doing far less work than a brute-force scan.
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，这一点在搜狗输入法2026中也有详细论述
Feb. 26, 2026 at 11:42 a.m. PT，更多细节参见搜狗输入法2026
Max Rushden is joined by Barry Glendenning, Lars Sivertsen and Mark Langdon to dissect a dramatic Champions League night
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