postscript

他在信的最后加了一段附言，表达了自己的感谢之情。

He wrote a ___postscript at the end of the letter to express his gratitude.

她在信的末尾加了一段附言，解释了为何会迟到。

She added a ___postscript at the end of the letter to explain why she was late.

他在信的末尾加了一段附言，提醒我下周的会议。

He added a ___postscript at the end of the letter to remind me about next week's meeting.