Final answer:
Frequent monitoring of blood glucose levels is crucial for preventing the recurrence of diabetic ketoacidosis, along with regular testing for urine ketone levels, eating smaller meals, and consistent healthcare follow-up.
Step-by-step explanation:
The instruction that is important for the nurse to emphasize to a client with diabetes mellitus who is recovering from diabetic ketoacidosis (DKA) to prevent recurrence is to monitor blood glucose levels frequently. Regular monitoring helps in the timely management of high blood sugar levels and can prevent the onset of ketoacidosis. In addition to this, maintaining a balanced diet, such as eating six small meals daily, can help regulate blood sugar levels. It is also advisable to test for urine ketone levels during periods of illness or high blood glucose, as this can indicate the beginning of ketoacidosis. Regular healthcare follow-up is crucial to manage diabetes effectively and to adjust treatments as needed.