His research covers a wide range of topics.

The lingering resonance of the music echoed in my heart and wouldn't fade away.

The lingering aftertaste of that music remained in my heart.

Before starting a new business, he evaluated all the risks as if he were crossing a stone bridge by tapping on it, meaning he was very careful.

The doctor examined my perineum.

He thought he was smart, but he remembered the proverb 'a fool may give a wise man council', and understood the importance of listening to others' opinions.