In order to sensitize them to security, new students are informed about all kinds of preventive measures as soon as they arrive at Yale: you should have three locks on your door; if you go out at night, you must ask the campus police to escort you home; the school publishes a security handbook every month which tells you which areas not to go into unless you absolutely have to.
為了安全起見，一到耶魯的新生就被告知種種防護措施：住處房舍至少要有三道鎖，夜間離去一定要請校園警衛護送，學校每月編有安全手冊，內載危險地帶，非必要勿去… …。