An accountant was having a hard time sleeping,so he went to see his doctor.

Accountant:Doctor,I can't fall asleep at night.

Doctor:Have you tried counting sheep?

Accountant:That's the problem.Every time when I made a mistake,it would take me two hours to find it.

译文：

    一名会计师常被失眠所困扰，所以他决定让医生来帮他解决问题。

会计师：医生，我晚上总是失眠，睡不着。

医生：你尝试过数羊的方法吗？

会计师：这正是问题的所在——我只要一数错，就要花两个小时的时间来找出错误。