“整本书你都读完了吗？”她目光敏锐地问道。"Have you read the whole book?" she asks, gimlet-eyed.她目光敏锐地看着他。She looked at him shrewdly.她非常敏锐地分析自己。She analyses herself with great subtlety....

“敏锐地”的英语可以翻译为：exquisitely，subtly，incisively，observantly ...