Author(s): Jun Chai, Javier LLorca
这种“重资产”的服务投入，看似是成本支出，实际也为平台赋能产业提供了信用背书：因为背后有了平台兜底，中小商户才敢于接待复杂的国际订单；因为知道遇到困难能获得有效救援，游客也才敢于探索非标的小众目的地。，详情可参考同城约会
，这一点在Line官方版本下载中也有详细论述
Every point gets examined, regardless of where it sits. Points on the opposite side of the map get the same treatment as points right next to the query region. We're doing a lot of unnecessary work.
Neil Sedaka: King of Song。同城约会对此有专业解读
UNSAT problem with 10 variables and 200 clauses