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.
增值税法第三条所称无形资产，是指不具实物形态，但能带来经济利益的资产，包括技术、商标、著作权、商誉、自然资源使用权和其他无形资产。
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Their mission: to find out if men could survive two weeks in space. If not, the Moon was out of reach.
Допрос подозреваемого в подрыве российского предпринимателя попал на видеоВ Подмосковье заложившего СВУ в машину бизнесмена мужчину привезли на допрос