a letter writer的用法和样例：
- Weeks later, a check arrived from Dubai for the landlady and a letter for Zoe, obviously written by a professional letter writer.
- I'm so glad you're a good letter writer!
- She sent me a real snorter of a letter.
- He imprinted a letter with a postmark.
- I receive a letter from her in her neat script.
- I want to address a letter to a friend.