17版 - 让中医药以新的姿态站到世界舞台(记者手记)

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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.

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macOS only. Windows and Linux ship different fonts with different glyph tables. Cross-platform scoring would require running on each OS or using freely distributable fonts.

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