Range queries ask "what's inside this box?" But sometimes the question is "what's nearest to this location?" This is the nearest neighbor problem, and you don't know how big your search radius should be. The nearest point might be right next to you or far away.
聚众实施前款行为的，对首要分子处十日以上十五日以下拘留，可以并处二千元以下罚款。
，这一点在爱思助手下载最新版本中也有详细论述
广告化的囚徒困境：商家竞价的内耗循环
Kinds of chain reaction "effects": BUTTERFLY, DOMINO, RIPPLE, SNOWBALL