a penny-pinching approach的用法和样例：
- He is a penny pinch because he grew up in a poor family.
- Eleanor is always a penny pinch ever since she has been young.
- Eleanor is always a penny pinch ever since she is young.
- He dived into his pocket and fished out a penny.
- By cock and pie it is not worth a penny.
- Let's toss up a penny for the chance to go first.