Correct Answer: A

Rationale: Choice A is the correct answer because consuming a snack when the blood glucose level is below 70 mg/dL helps prevent hypoglycemia in clients with diabetes mellitus. Choice B is incorrect because taking insulin when blood glucose is high (above 200 mg/dL) helps manage hyperglycemia, not hypoglycemia. Choice C is incorrect as checking blood glucose levels once a week is insufficient for proper diabetes management, which typically requires more frequent monitoring. Choice D is incorrect because waiting for symptoms of hyperglycemia to take insulin can lead to uncontrolled blood glucose levels.

Correct Answer: A

Rationale: Administering anticoagulants is the most crucial nursing action for a patient experiencing a deep vein thrombosis (DVT). Anticoagulants help prevent further clot formation and reduce the risk of complications such as pulmonary embolism. Encouraging ambulation, applying compression stockings, and monitoring oxygen saturation are important interventions in managing DVT, but administering anticoagulants takes priority as it directly targets the clotting process and prevents clot progression.

Correct Answer: A

Rationale: The most important nursing intervention for a patient with a suspected pulmonary embolism is to administer anticoagulants. Anticoagulants help prevent further clot formation in the patient's blood vessels, reducing the risk of complications such as worsening of the pulmonary embolism or development of new clots. Administering oxygen (Choice B) may be necessary to support the patient's oxygenation, but anticoagulants take precedence as they target the underlying cause of the pulmonary embolism. Repositioning the patient (Choice C) and monitoring oxygen saturation (Choice D) are important aspects of patient care but are not the primary intervention for a suspected pulmonary embolism.

Correct Answer: A

Rationale: The first action to take when a patient experiences a seizure is to protect the patient from injury. This is crucial to prevent harm during the seizure. Administering oxygen, IV fluids, or anti-seizure medication may be necessary based on the patient's condition, but ensuring their safety by removing harmful objects, cushioning their head, and keeping the area clear is the immediate priority. Administering oxygen, IV fluids, or medication would come after ensuring the patient's safety.

Correct Answer: A

Rationale: The correct answer is A, Broccoli. Foods high in tyramine, such as broccoli, should be avoided when taking MAOIs like phenelzine to prevent a hypertensive crisis. Yogurt, cream cheese, and fruit juice do not contain significant levels of tyramine and can be safely consumed while on phenelzine.