Final answer:
The nurse should respond empathetically and validate the client's feelings while still maintaining professionalism.
Step-by-step explanation:
In this scenario, the nurse should respond empathetically and validate the client's feelings while still maintaining professionalism. They could say something like, 'I'm sorry to hear that you had a negative experience during your last hospitalization. It's important for nurses to provide compassionate care and create a supportive environment. If you have any concerns about your current care or any questions, please let me know and I'll do my best to address them.'