Simple:
* She was a studious student who always got good grades.
* He spent many studious hours in the library.
* The studious atmosphere in the classroom was conducive to learning.
More complex:
* Despite his studious nature, he struggled to connect with his classmates.
* The professor's studious gaze conveyed his deep interest in the subject.
* His studious demeanor, often mistaken for aloofness, masked a kind heart.
Figurative:
* The studious silence of the forest allowed her to hear the rustling of leaves.
* The artist's studious brushstrokes captured the intricate details of the portrait.
Remember:
* Studious is an adjective, meaning "given to or characterized by study".
* It can describe people, places, or things.
* Use it to emphasize someone's dedication to learning or a thoughtful, deliberate approach to a task.