"Burning the midnight oil again, huh, Yu?"
Philip straightened at a voice at his door. Turning in his chair, he smiled at the man leaning against the frame. "Ah, I hadn't realized it had gotten so late. Are you going, Doctor Grewal?" The doctor, a man who was in his fifties and looked it, laughed and shook his head.
"You bet. I'm not a masochist, unlike some people I know. That's, what, the third time this week? Geez. What are they teaching you in school these days, I wonder."