副詞 exactly:

1. indicating exactness or preciseness
   同義詞：precisely, just
2. just as it should be
   同義詞：precisely, on the nose, on the dot, on the button
3. in a precise manner
   同義詞：precisely, incisively

1. The train arrived at exactly 8 o'clock.
   火車(chē)八點(diǎn)鐘準(zhǔn)時(shí)到達(dá)。
2. Their answers are exactly the same.
   他們的回答完全一樣。
3. Tell me exactly where he is.
   確切地告訴我他在什么地方。

ex.act.ly

adv.（副詞）
In an exact manner; accurately.
精確地，確切地：以精確的方式；準(zhǔn)確地
In all respects; just:
完全地；全然：
例句：
Do exactly as you please.
完全照你的意思去做吧

As you say. Used to indicate agreement.
正，恰?。赫缒闼?。用來(lái)表示贊同