Lines of single_doc/关于残局对手.md from check-in e7f204fb3d that are changed by the sequence of edits moving toward check-in 67057d4f45:

                         1: 残局对手一般分为三种层次：
                         2: 
                         3: 1. 卡少。
                         4: 1. 卡多但呆呆挨打。
                         5: 1. 卡多且有互动。