积极

He is an optimistic and positive person.

He is very active in his work.

We can't learn passively, we should be proactive.

Students are actively participating in various activities organized by the school.

Every time he was in Chinese class, David answered the teacher's questions positively.

Some people are very optimistic, very positive, they face the difficulties bravely, find a way to solve the problem, the situation will get better and better.