a well-to-do family的用法和样例：
- Peyton Fahrquhar was a well to do planter, of an old and highly respected Alabama family.
- They set out to drive a well to get well water.
- It is better to do well than to say well.
- In a word, we must try our best to do it.
- Robert is a willing horse and I know he'll try his best to do all the work we give him.