"Practice of Dr. Breen" is a multi-layered novel by the American writer William Dean Howells, which allows readers to immerse themselves in the atmosphere of an American city at the end of the 19th century. The main character, Dr. Eben Breen, is known for his high medical ethics and unwavering care for his patients. In the novel, the author adheres to a realistic style, revealing deep psychological portraits of the characters and recreating complex moral situations. "Dr. Breen's Practice" is not only a story about medical practice, but also an elegantly written novel that leaves behind many thoughts and feelings in readers.