a general feeling of optimism的用法和样例：
- There was a feeling of optimism in the country when the new government was elected.
- Similarly, a general feeling of insecurity can sometimes take the form of overdressing in warmer than are necessary.
- Empty nest syndrome is a general feeling of loneliness that parents or other guardian relatives may feel when their children leave home.
- Fragmentation experiences may range from mild dysphoria (a general feeling of ill being, anxiety, discontent, and physical discomfort) to a panicked sense of impending annihilation or disintegration.