There are many different jobs at a hospital beyond just doctors and nurses. The document demonstrates how to chunk or summarize paragraphs to understand the main idea. It provides examples of chunking paragraphs about various hospital jobs such as ambulance drivers, receptionists, cooks, and cleaning staff. Chunking the paragraphs helps identify that the main ideas are about the different types of workers found in a hospital and their roles in transporting, greeting, feeding, and cleaning up after patients.