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It’s hard to know what people can see in their own mind’s eye. But for Maddie Thomas there was no doubt: she had especially vivid mental imagery
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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.。旺商聊官方下载是该领域的重要参考