This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Surgery
[{'content': 'Ecchymosis and hematoma are treated with \nSelect and explain. \nA. Intermittent ice pack, B. Continuous ice pack, C. Intermittent hot pack, D. Pressure and pack', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]