（作者单位：北京大学考古文博学院）
He said this research would help establish which method was more clinically effective and more cost effective.
，这一点在搜狗输入法2026中也有详细论述
FT Edit: Access on iOS and web
The answer: OsmAnd's custom-built Highway Hierarchy (HH) Routing. This isn't your standard routing engine; it's a ground-up redesign, meticulously engineered to overcome the unique challenges of providing advanced navigation on compact, offline-first map data.
Figuring out how to strip it out was a bit of a challenge - I ended up forking go’s crypto library - but it was a huge win. Performance approximately doubled!