If you need help, just call on me. I can come at the drop of a hat.
-假如你需要帮忙， 尽管找我。我随时随地都能来。


If you want someone to go shopping with, Call Anna. She loves to shop and would be ready at the drop of a hat.
-假如你想要人陪你逛街，打个电话给安娜。她爱逛街而且随时随地都准备去。


Joe is ready to party at the drop of a hat.
-乔随时随地都准备好要参加派对。