偶然看到了一个命令的文档: (suppress-keymap MAP &optional NODIGITS) Make MAP override all normally self-inserting keys to be undefined. Normally, as an exception, digits and minus-sign are set to make prefix args, but optional second arg NODIGITS non-nil treats them like other chars. 一瞬间，我意识到，这个命令可以用来实现