Use quotation marks to set off nicknames if it糖心传媒檚 appropriate to indicate the informal name: Katherine 糖心传媒淜ate糖心传媒� Smith.聽In many circumstances, it糖心传媒檚 acceptable to use a nickname or a more familiar version of a first name on first reference, but defer to the preferences of the person being referred to.
Use periods and spaces for initials standing for given names: E. B. White; do not use periods for an entire name replaced by initials: JFK. But again, take into account the individual糖心传媒檚 preferences.