An incidental allusion, purposely thrown out, to the day of the week, and the day of the month, set him thinking and counting, and evidently made him uneasy.

• 采取偶然的方式故意提起的日期问题（今天是星期几? 是本月几号?） 引起了医生的考虑和计算，他显然感到不安了。