如果某人in the palm of your hand，那你就完全的管控了此人。
- Elvis Presley was a great performer; he had the audience in the palm of his hand.
- Joan knew all her neighbours‘ shameful secrets. She felt they were in the palm of her hand.
值得注意的是，短语give someone a hand的意思是帮助某人。
- I know how to operate this machine. Let me give you a hand.