lastly和at last有什麼區別

例句：

1、Lastly, I would like to ask about your future plans...

最後，我想問一下你未來的計劃。

2、They wash their hands, arms and faces, and lastly, they wash their feet.

他們洗了手、胳膊和臉，最後腳也洗了。

3、Lastly, I would like to thank my parents for all their support.

最後一點，我想感謝父母對我的全力支持。