Correct Answer: B

Rationale: The correct answer is B: Apply insect repellent to clothing and exposed skin. This advice helps prevent insect bites, reducing the risk of recurrence. Insect repellent creates a barrier against insects, hence minimizing the chances of getting bitten. Other choices are incorrect as they do not directly address the prevention of insect bites. Choice A is vague and does not provide a specific preventive measure. Choice C is incorrect as thick woollen clothing may not necessarily prevent insect bites. Choice D, sunscreen lotion, protects against UV rays, not insect bites.

Correct Answer: D

Rationale: The correct answer is D because using two pillows to raise the head can increase the risk of venous stasis and thrombosis in a client with polycythemia vera. This condition involves an increased production of red blood cells, leading to thicker blood and potential clot formation. Elevating the head too much can impede blood flow, exacerbating the risk of clotting. Choices A, B, and C are all appropriate statements indicating good self-care practices and physical activity, which are beneficial for clients with polycythemia vera to improve circulation and overall health.

Correct Answer: D

Rationale: The correct answer is D: 2, 4, 5, and 6. 1. Room humidifier (choice 2) helps to keep the air moist, which can ease sinus pressure and discomfort. 2. Hot moist packs (choice 4) can provide relief by reducing congestion and promoting sinus drainage. 3. Percussion and postural drainage (choice 5) can help loosen mucus and improve drainage. 4. Semi-fowler's position (choice 6) can also aid in drainage and reduce sinus pressure. Choices A, B, and C are incorrect because they do not include all the recommended interventions that can help increase comfort in a patient with sinusitis. Each of the incorrect choices is missing at least one crucial recommendation that is beneficial for managing sinusitis symptoms.

Correct Answer: B

Rationale: The correct answer is B: Ambulate with assistance. Ambulating helps prevent further bone loss and strengthens muscles, important for osteoporosis patients. Bedrest can worsen bone density loss. Encouraging fluids and providing a high-protein diet are important for overall health but do not directly address the weakness associated with osteoporosis.

Correct Answer: B

Rationale: The correct answer is B because emphysema is characterized by the destruction of the alveoli walls, leading to a loss of elasticity in the lungs. This results in air becoming trapped in the lungs, making it difficult to exhale properly. Explanation for why the other choices are incorrect: A: Inflamed bronchioles causing secretions describe bronchitis, not emphysema. C: Damage to the blood supply isn't a primary feature of emphysema; it's more about lung tissue destruction. D: Large dilated sacs of sputum in the lungs is not an accurate description of emphysema; it's more related to bronchiectasis.