相较于这些充满想象力和争议的智能硬件，智能手机与AI融合的成效则显得平平无奇。
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.，推荐阅读Line官方版本下载获取更多信息
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