Although she was quite young, she showed a lot of initiative and was promoted to manager after a year.
她雖然很年輕,但工作積極主動,一年後就獲提拔為經理。
I shouldn't always have to tell you what to do, use your initiative (= use your own judgment to decide what to do)!
不能總讓我告訴你該做甚麼,你應該有自己的判斷!