在emacs-org-mode GNU列表上的集体建议使用org-entity(C-h i g (org) Special symbols)\ast{}而不是零宽度的空格字符(我在此处的其他答案中建议)后,得出了这个答案。
以下是一种通用解决方案,用户无需记住各种符号的组织实体。用户执行操作时,它将插入组织实体(如果有)C-u SYMBOL;适用于C-u *,C-u /,C-u =,等。  
(defun modi/org-entity-get-name (char)
  "Return the entity name for CHAR. For example, return \"ast\" for *."
  (let ((ll (append org-entities-user
                    org-entities))
        e name utf8)
    (catch 'break
      (while ll
        (setq e (pop ll))
        (when (not (stringp e))
          (setq utf8 (nth 6 e))
          (when (string= char utf8)
            (setq name (car e))
            (throw 'break name)))))))
(defun modi/org-insert-org-entity-maybe (&rest args)
  "When the universal prefix C-u is used before entering any character,
    insert the character's `org-entity' name if available.
    If C-u prefix is not used and if `org-entity' name is not available, the
    returned value `entity-name' will be nil."
  ;; It would be fine to use just (this-command-keys) instead of
  ;; (substring (this-command-keys) -1) below in emacs 25+.
  ;; But if the user pressed "C-u *", then
  ;;  - in emacs 24.5, (this-command-keys) would return "^U*", and
  ;;  - in emacs 25.x, (this-command-keys) would return "*".
  ;; But in both versions, (substring (this-command-keys) -1) will return
  ;; "*", which is what we want.
  ;; http://thread.gmane.org/gmane.emacs.orgmode/106974/focus=106996
  (let ((pressed-key (substring (this-command-keys) -1))
        entity-name)
    (when (and (listp args) (eq 4 (car args)))
      (setq entity-name (modi/org-entity-get-name pressed-key))
      (when entity-name
        (setq entity-name (concat "\\" entity-name "{}"))
        (insert entity-name)
        (message (concat "Inserted `org-entity' "
                         (propertize entity-name
                                     'face 'font-lock-function-name-face)
                         " for the symbol "
                         (propertize pressed-key
                                     'face 'font-lock-function-name-face)
                         "."))))
    entity-name))
;; Run `org-self-insert-command' only if `modi/org-insert-org-entity-maybe'
;; returns nil.
(advice-add 'org-self-insert-command :before-until #'modi/org-insert-org-entity-maybe)
因此,当用户键入C-u *,\ast{}并在回显区域中显示以下消息时,
  为符号*插入'org-entity'\ ast {}。
如果org-pretty-entities在t上方设置,插入的\ast{}将显示为*。
如果org-entity字符X不存在,并且用户使用C-u X,则X会被简单地插入4次(C-u通常是这样)。
               
              
\ast{}shrug\ast{}或\star{}shrug\star{},类似的方法,使用实体编码:a;,或者如果在星号之前或之后添加空格也是可行的。