Correct Answer: C

Rationale: The correct answer is to look along the scalp line for white dots (nits) when checking for head lice. White dots/nits are the eggs of head lice and are commonly found attached to the hair shaft near the scalp. This method helps identify if head lice are present. Choice A is incorrect as itching alone may not be a definitive sign of head lice; it could be due to other reasons. Choice B is irrelevant as ear mites in dogs are not related to head lice infestation in humans. Choice D is also incorrect as observing between the fingers for red lines is not a method for checking head lice.

Correct Answer: D

Rationale: For a child with diabetes mellitus, following a specific meal plan is crucial for managing blood glucose levels effectively. This helps in maintaining stable blood sugar levels and preventing complications associated with the condition. Monitoring blood glucose levels daily and recognizing signs of hypoglycemia are also important aspects of managing diabetes; however, adherence to a specific meal plan plays a fundamental role in overall diabetes care. Administering insulin based on blood glucose levels alone is not recommended without a specific plan provided by healthcare providers.

Correct Answer: D

Rationale: The correct answer is D, severe joint pain. Rheumatic fever commonly presents with severe joint pain due to joint inflammation. Jaundice (choice A) is not typically associated with rheumatic fever. Peeling skin on the hands and feet (choice B) is more indicative of conditions like Kawasaki disease. While a high fever (choice C) can be present, it is not as specific to rheumatic fever as severe joint pain. Severe joint pain, along with other criteria like carditis, subcutaneous nodules, erythema marginatum, and Sydenham chorea, are major criteria used in the diagnosis of rheumatic fever.

Correct Answer: A

Rationale: The correct answer is A: Syndrome of inappropriate antidiuretic hormone (SIADH). Vasopressin is a medication used to treat diabetes insipidus by increasing water reabsorption in the kidneys. However, an excessive dose of vasopressin can lead to water retention, causing SIADH, which is characterized by dilutional hyponatremia. Choices B, C, and D are incorrect. Thyroid storm is a severe form of hyperthyroidism characterized by increased metabolism and can lead to life-threatening complications. Cushing syndrome results from excess cortisol production and is characterized by weight gain, hypertension, and other features. Vitamin D toxicity occurs due to an overdose of vitamin D, leading to hypercalcemia and symptoms such as nausea, vomiting, and weakness.

Correct Answer: B

Rationale: The correct answer is to use a soft toothbrush for oral care. Children with hemophilia have a decreased ability to form blood clots, leading to prolonged bleeding. Using a soft toothbrush helps prevent trauma to the gums and oral mucosa, reducing the risk of bleeding. Encouraging participation in contact sports (Choice A) is contraindicated in hemophiliac patients due to the high risk of injury and bleeding. Administering nonsteroidal anti-inflammatory drugs (Choice C) and aspirin (Choice D) should be avoided in hemophilia as they can further increase the risk of bleeding due to their antiplatelet effects.