Final answer:
The nurse should include the intervention of administering vitamin B12 injections in the care plan for a patient with pernicious anemia.
Step-by-step explanation:
The nurse should include the intervention of administering vitamin B12 injections in the care plan for a patient with pernicious anemia. Pernicious anemia is caused by poor absorption of vitamin B12, so administering it through injections bypasses the need for absorption in the digestive tract. This ensures that the patient receives an adequate supply of vitamin B12.