translation.ar: الناس في دراستنا الذين كانوا أسعد في التقاعد هم الذين عملوا بنشاط ليحل رفقاءهم الجدد محل زملاء العمل.
translation.en: The people in our 75-year study who were the happiest in retirement were the people who had actively worked to replace workmates with new playmates.