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.
“我的很多提案都不是一年之功，也不是一人之力，而是一个持续积累深化、团队共同努力的过程。”随着调研的深入，韦军发现残障人士就业涉及残联、人社、教育、民政等多个部门。要解决问题，既要转变大家的传统观念，也要推动各部门协同发力。为此，韦军在提案中提出建立跨部门联席会议制度、信息共享平台等机制性建议，推动政策制度协同。
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