里面提到的方法还是有用的（后面谁说没有用的 
至于这个问题
修改下函数org-do-emphasis-faces就行了
(defun org-do-emphasis-faces (limit)
"Run through the buffer and emphasize strings."
(let ((quick-re (format "\\([%s]\\|^\\)\\([~=*/_+]\\).*?[~=*/_+]"
(car org-emphasis-regexp-components))))
(catch :exit
(while (re-search-forward quick-re limit t)
(let* ((marker (match-string 2))
(verbatim? (member marker '("~" "="))))
(when (save-excursion
(goto-char (match-beginning 0))
(and
;; Do not match table hlines.
(not (and (equal marker "+")
(org-match-line
"[ \t]*\\(|[-+]+|?\\|\\+[-+]+\\+\\)[ \t]*$")))
;; Do not match headline stars. Do not consider
;; stars of a headline as closing marker for bold
;; markup either.
(not (and (equal marker "*")
(save-excursion
(forward-char)
(skip-chars-backward "*")
(looking-at-p org-outline-regexp-bol))))
;; Match full emphasis markup regexp.
(looking-at (if verbatim? org-verbatim-re org-emph-re))
;; Do not span over paragraph boundaries.
(not (string-match-p org-element-paragraph-separate
(match-string 2)))
;; Do not span over cells in table rows.
(not (and (save-match-data (org-match-line "[ \t]*|"))
(string-match-p "|" (match-string 4))))))
(pcase-let ((`(,_ ,face ,_) (assoc marker org-emphasis-alist))
(m (if org-hide-emphasis-markers 4 2)))
(font-lock-prepend-text-property
(match-beginning m) (match-end m) 'face face)
(when verbatim?
(org-remove-flyspell-overlays-in
(match-beginning 0) (match-end 0))
(remove-text-properties (match-beginning 2) (match-end 2)
'(display t invisible t intangible t)))
(add-text-properties (match-beginning 2) (match-end 2)
'(font-lock-multiline t org-emphasis t))
(when (and org-hide-emphasis-markers
(not (org-at-comment-p)))
(add-text-properties (match-end 4) (match-beginning 5)
'(invisible t))
(add-text-properties (match-beginning 3) (match-end 3)
'(invisible t)))
(throw :exit t))))))))
