a jolly person的用法和样例：
- Grandfather is in his seventies, and is still strong and healthy. He has a loud voice and a big laugh. He is a jolly person and likes to make friends.
- Laura is a jolly girl; she laughs a lot.
- We had a jolly time last weekend.
- He's going to be a jolly tough candidate to beat.
- Your mother is a jolly, easy-going woman.
- He was big and hearty, a great beer drinker, a jolly companion on a pub crawl.