Final answer:
The appropriate meal size for a bariatric surgery patient when they are first discharged home is about 2/3 cup.
Step-by-step explanation:
The appropriate meal size for a bariatric surgery patient when they are first discharged home is about 2/3 cup, as explained by the nurse. Bariatric surgery reduces the size of the stomach and the length of the small intestine, which means that the patient can eat less food at a time. Portion control is important to limit the amount of food consumed on a regular basis, and the nurse's recommendation of about 2/3 cup aligns with this principle.