Correct Answer: C

Rationale: Accompanying the patient for his walk is the appropriate nursing intervention in this scenario to ensure his safety during his first ambulation. This allows the nurse to provide immediate assistance if needed and ensures the patient's well-being during this critical postoperative period.

Correct Answer: D

Rationale: Leukocytosis is defined as an increase in the total white blood cell count. A normal WBC count typically ranges from 4,500 to 10,000/mm³. A WBC count of 25,000/mm³, as indicated in choice D, is significantly higher than the normal range and clearly indicates leukocytosis.

Correct Answer: C

Rationale: Accompanying the patient for his walk is the appropriate nursing intervention in this scenario to ensure his safety during his first ambulation. This allows the nurse to provide immediate assistance if needed and ensures the patient's well-being during this critical postoperative period.

Correct Answer: A

Rationale: Penicillin can be administered intramuscularly or intravenously.

Correct Answer: B

Rationale: During a Romberg test, the patient is asked to stand with feet together and arms at the sides. The test evaluates proprioception and vestibular function by assessing the patient's ability to maintain balance with eyes closed. Asking the patient to stand helps to detect any balance issues or disturbances in the absence of visual input.