Final answer:
The question concerns English literature, where Jeffrey is upset because someone is left at home when he goes for treatments, but the information provided doesn't specify who this person is.
Step-by-step explanation:
The question seems to pertain to a specific story, where Jeffrey is upset because someone he cares about is left at home while he goes for medical treatments. From the given context, it's not entirely clear who Jeffrey is upset about being left behind. It could be a sibling, a family pet, or another figure central to his life. Such a situation is often used in literature to explore themes of family, responsibility, and the struggles of dealing with illness. As tutors, we encourage students to think about the characters involved and the emotional impact such events have on them, aiding in the understanding of character development and thematic elements in literature.