a special treat的用法和样例：
- We took the kids to the zoo as a special treat.
- Always be happy about getting a special treat.
- The children were given milk shakes as a special treat.
- Steve: He's been cooking a special treat for you guys. I think he just went to the kitchen to check on it.
- A special treat is the peculiar courting display of the breeding American Woodcocks during the evening in late March.