Correct Answer: A

Rationale: Applying a warm compress to the affected ear is a recommended home remedy for earaches as it can help reduce pain and discomfort. The warmth can also help improve circulation and promote drainage if there is fluid buildup. Giving a cold drink (Choice B) is not typically beneficial for earaches and fever. Administering acetaminophen (Choice C) can help reduce fever and alleviate pain, but addressing the earache directly with a warm compress is a more targeted approach. Taking the child to the emergency department (Choice D) is not necessary for a common earache unless there are severe symptoms or complications present.

Correct Answer: B

Rationale: In Addison's disease, adrenal insufficiency leads to decreased aldosterone production. This results in impaired sodium retention and potassium excretion, leading to hyperkalemia. Therefore, the correct answer is hyperkalemia (choice B). Hypernatremia (choice A) is less likely because of the loss of sodium in Addison's disease. Hyperglycemia (choice C) and hypercalcemia (choice D) are not typically associated with Addison's disease and are less likely to be present in this condition.

Correct Answer: A

Rationale: Projectile vomiting is the hallmark clinical manifestation of pyloric stenosis in infants. In pyloric stenosis, the muscle surrounding the opening between the stomach and the small intestine thickens, leading to obstruction. This obstruction causes forceful, projectile vomiting, which is typically non-bilious (does not contain bile) and occurs after feedings. Choices B, C, and D are incorrect because diarrhea, constipation, and abdominal distension are not typical symptoms of pyloric stenosis.

Correct Answer: C

Rationale: In pyloric stenosis, a palpable olive-like mass in the abdomen is a classic finding. This mass is due to the hypertrophied pyloric muscle. Abdominal rigidity (choice A) is associated with conditions like peritonitis, substernal retraction (choice B) is typically seen in respiratory distress, and marked distention of the lower abdomen (choice D) is more characteristic of conditions like intestinal obstruction rather than pyloric stenosis.

Correct Answer: B

Rationale: The priority nursing intervention for a 7-year-old child with type 1 diabetes mellitus is monitoring blood glucose levels. This is crucial for managing and adjusting insulin therapy to maintain blood glucose within the target range. Administering insulin as prescribed is important but should be based on monitoring blood glucose levels. Teaching the child how to self-administer insulin may be appropriate for older children but may not be the priority for a 7-year-old. Encouraging regular exercise is a valuable aspect of diabetes management but is not the immediate priority over monitoring blood glucose levels.