a serious man的用法和样例：
- You can never soft-soap a serious man like him.
- To mock such a serious man as Don Guillermo is beyond all right.
- George was a serious man and insensible to such enticements.
- Life, for Lowell, was a serious matter, just as he was a serious man.
- The poor man has a serious disease of the liver.
- Vito Corleone: I said that I would see you, because I heard you were a serious man, to be treated with respect.