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.
// 在剩余未排序部分找真正的最小值，推荐阅读Line官方版本下载获取更多信息
What is this page?。同城约会是该领域的重要参考
Equal (0): Everything in this space must be equal to 0. The answer is 0-0, placed horizontally; 3-0, placed vertically.，详情可参考搜狗输入法2026