You do this by你干什么这了
do lessons by correspondence通过函授进行学习
do well by someone对待某人很好
do everything by rule照章办事
do event by oneself单挑
do that by halves半途而废
do sth by chance碰巧
Do it by system用体系做事
do sth by hand靠手工
V（动词） to treat in the manner specified 特殊对待
employers do well by hard working employees