中巴经济走廊：瓜达尔港+中巴管道/铁路快速投用，中东原油经巴基斯坦陆路入疆，彻底绕开了霍尔木兹与马六甲；
隐私 — GDPR 和其他法规要求谨慎处理数据，这一点在新收录的资料中也有详细论述
Mitchell Hashimoto Co-founder, HashiCorp，推荐阅读新收录的资料获取更多信息
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.，更多细节参见新收录的资料