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除了双击鼠标（这个好像只能从前往后选），有没有按功能键的？

你加一段代码到.emacs里面之后，就可以用%来找到对应的（）
;; Use % for {} matching
(global-set-key "%" 'match-paren)
(defun match-paren (arg)
"Go to the matching paren if on a paren; otherwise insert %."
(interactive "p")
(cond ((looking-at "\\s\(") (forward-list 1) (backward-char 1))
((looking-at "\\s\)") (forward-char 1) (backward-list 1))
(t (self-insert-command (or arg 1)))))

`C-M-n'
Move forward over a parenthetical group (`forward-list').

`C-M-p'
Move backward over a parenthetical group (`backward-list').

`C-M-u'
Move up in parenthesis structure (`backward-up-list').

`C-M-d'
Move down in parenthesis structure (`down-list').