Correct Answer: B

Rationale: The correct answer is B. A high PaCO2 level (55 mm Hg) in a client with chronic emphysema suggests respiratory acidosis, which requires further treatment. In chronic emphysema, impaired gas exchange leads to elevated carbon dioxide levels in the blood. Option A (PaO2 level of 89 mm Hg) is near the normal range and does not indicate immediate treatment. Option C (HCO3 level of 25 mEq/L) and option D (pH level of 7.37) are within normal limits and do not suggest the need for further treatment in this context.

Correct Answer: C

Rationale: The correct answer is C. Regular exercise is an essential component in managing hypertension. Exercising for at least 30 minutes a day, at least 5 days a week, can help control blood pressure. Checking blood pressure regularly (choice A) is important, but not as indicative of understanding the teaching as the commitment to regular exercise. Avoiding foods high in potassium (choice B) is not a typical recommendation for managing hypertension. Taking medication only when feeling dizzy (choice D) is incorrect and potentially dangerous; medications should be taken as prescribed by the healthcare provider.

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: C

Rationale: The correct answer is C. Clients with type 1 diabetes should rotate injection sites within the same anatomical region to prevent lipodystrophy. Choice A is incorrect because blood glucose levels should be checked regularly, not only when feeling sick. Choice B is incorrect as injecting insulin in the same spot each time can lead to lipodystrophy. Choice D is incorrect as insulin injections are usually required based on meal schedules and blood glucose levels, not just when levels are above 200 mg/dL.

Correct Answer: C

Rationale: The correct action the nurse should take when caring for a client experiencing acute alcohol withdrawal is to administer lorazepam as prescribed. Lorazepam is a benzodiazepine used to prevent seizures and manage agitation in clients undergoing alcohol withdrawal. Administering haloperidol (Choice A) is not recommended in alcohol withdrawal as it may lower the seizure threshold. Keeping the client in a supine position (Choice B) is not specifically indicated in managing alcohol withdrawal. Encouraging the client to drink fluids with meals (Choice D) is important for hydration but does not address the acute symptoms of alcohol withdrawal.