How to reply to the thank-you messages from elders?

Just be sincere, there is no need to spend too much money on sentences. For example, "I have caused trouble to my uncle and aunt these two days." Thank you for your care these days. " Although simple, I expressed my gratitude and basic courtesy.

The teacher is a candle. Although thin, it is hot and scattered, illuminating others and exhausting yourself. This selfless dedication is unforgettable. The language of your lectures is as sweet as a tinkling mountain spring, as cordial as a gurgling stream and as exciting as a rushing river.