尽职的

例句：

1. 1. He is a diligent student who always completes his homework on time.
   他是一个勤奋的学生，总是按时完成他的家庭作业。
2. 2. The diligent worker always comes to work early and does his best work.
   这位勤奋的工人总是早早来上班，并尽力做好工作。
3. 3.She was diligent in her studies and eventually earned a scholarship.
   她在学习上非常勤奋，最终获得了奖学金。