Saying thank you to someone should happen soon after the event, gift, or conversation that causes you to feel appreciation for what they've said or done.

表达感激应该在你收到礼物，或谈话之后不久，因为你的感激之情是在这些行为发生之后。

youdao

Send a thank-you note after the interview. Thank the person you were able to meet with for hi or her time and effort.

接受面试后发送一封感谢性的邮件。感谢面试你的人所付出的时间和努力。

youdao

After an interview, send a thank-you note (via E-mail or regular mail) to show your gratitude to the interviewer for taking the time to meet with you.

面试过后，发一封感谢信(通过电子邮件或是信件)来表达你对面试官花时间见你的感谢之情。

youdao

It's usual after you thank the family, you thank your agent and yes I do want to thank him and through him the wonderful people of Sedgefield.

BBC: NEWS | UK | UK Politics | In full: Tony Blair's speech

Speaking of the future, make sure to send a polite thank you note via email after you obtain the feedback and thank them for their time and insights.

FORBES: Job Search Success is the Best Revenge

Employees can even write personal thank you notes after a call.

FORBES: America's Happiest Employee