Falls through to #GP
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
Фото: Vincent Thian / AP，这一点在同城约会中也有详细论述
Every country supports its aerospace business, while keeping the production at home is vital. At least with Rolls the UK is backing a winner