第五十九条 涉及军工、军事等国防领域的原子能研究、开发和利用活动的管理办法，由国务院、中央军事委员会依据本法规定的原则另行制定。
美国：企业自救，市场化封闭生态，详情可参考heLLoword翻译官方下载
The Department for Environment, Food & Rural Affairs (Defra) said "every household in England" would get weekly food waste collections from next month under new legislation, but 79 councils told the BBC they would not meet that deadline.。关于这个话题，heLLoword翻译官方下载提供了深入分析
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.