Language Point 3

Because of the positive method, I eagerly answered all the questions I could, never worrying about making mistakes. (Para.2)
Meaning: Because of the effective and helpful method, I was very willing to answer all the questions I could, and I never worried about making mistakes.
positive: a.
1. effective; helpful
Don't just watch me; give me some positive advice. 别只是看着我，给我提些积极的建议吧。
2. definite, allowing no room for doubt
We still don't have a positive answer as to how he died. 他究竟如何死的,我们还没有得出明确的答案。
He was expected to make a positive decision about whether these workers were to be fired. 他应对是否解雇这些工人做出明确的决定。
3. sure, having no doubt about sth.
Are you positive that he's the man you saw yesterday? 你能确定他就是你昨天看到的那个人吗?
She was positive that John would help her out of trouble. 她相信约翰会帮她摆脱困境的。