Albert was quite nervous when he met the doctor because he had spent the day wondering what to tell the doctor. So, when the time arrived for his appointment he had thought over it so much that he was quite nervous. He was afraid of the fact that Yuri might have told his false plan to leave the school. So, he can’t tell a lie. So, he is nervous thinking that his lies may be detected. This nervousness indicates that he was gentle and honest person.