a positive person的用法和样例：
- Nicole is such a positive person.
- You don't have to put a good spin on everything. Even though you are a positive person.
- Her behaviour was a positive outrage.
- In the RXRB polymorphism, no genotype TT was observed in patients with psoriasis guttata with a positive personal history of repeated tonsillitis.
- This charge is a positive charge.