Ans. B. Observe patient for 2 hours after mealIn this condition because the food is often regurgitated after meals, the staff may be able to control vomiting by making the bathroom inaccessible for at least 2 hours after meals or by having an attendant in the bathroom to prevent the oppounity for vomiting.The hospital staff should give the patients about 500 calories over the amount required to maintain their present weight (usually 1500 to 2000 calories a day).