adopt an optimistic attitude的用法和样例：
- The most valuable thing in our life is that we should adopt an optimistic, sanguine, magnanimous attitude towards life.
- Approach each challenge with an optimistic attitude.
- Traceless is a kind of calm after the troubled state of mind, but more is an optimistic attitude towards life.
- In his romantic comedies, Shakespeare takes an optimistic attitude toward love and youth, and the romantic elements are brought into full play.