NEW YORK — The New York City medical examiner’s office has identified the remains of another victim of the Sept. 11 attacks on the World Trade Center. The office announced Thursday it had identified Anna A. Laverty, a 52-year-old legal secretary at Fiduciary Trust Co. who lived in Middletown. The identification came after remains recovered in the original efforts at the World Trade Center site were retested. More than 2,750 people are listed as having died at the World Trade Center in the attacks. The number of identifications is now 1,634.