Etiquette谢谢thank you
Your host offers more food or another drink.
What to do
Thank them and say clearly whether you would like more. It is fine to decline alcohol or explain a dietary need.
Context
You do not need to accept something that makes you uncomfortable. A warm, direct answer helps your host understand your preference.
Useful phrase
Thank you, I don't drink alcohol.
谢谢，我不喝酒。