Correct Answer: A

Rationale: The correct answer is to rotate injection sites. Rotating injection sites is crucial in insulin administration to prevent lipodystrophy, which is the breakdown of subcutaneous fat at the injection site. It also helps ensure consistent insulin absorption. Administering insulin before meals (choice B) is important to match insulin peak action with the rise in blood glucose after eating. Storing insulin in the refrigerator (choice C) is correct to maintain its potency and stability. Administering insulin at bedtime (choice D) may not be suitable for all patients and is not a universal recommendation for insulin administration.

Correct Answer: A

Rationale: Tachypnea, which refers to rapid breathing, is an early sign of congestive heart failure. In heart failure, the heart's inability to pump efficiently can lead to fluid accumulation in the lungs, causing the child to breathe faster to try to compensate for the decreased oxygen exchange. Bradycardia (slow heart rate) is not typically associated with congestive heart failure; instead, it may indicate a different issue. Inability to sweat is not a common early sign of congestive heart failure. Increased urinary output is not a typical early sign of congestive heart failure; instead, it may be a sign of other conditions like diabetes or kidney issues.

Correct Answer: B

Rationale: The correct answer is B: Signs of child abuse. When a nurse observes large welts and scars on a child, it raises concern for possible child abuse. It is crucial for the nurse to assess further for signs of abuse, document findings, and report appropriately to protect the child. Choice A, history of an injury, is not specific to potential abuse and may not provide insight into the current situation. Choice C, presence of food allergies, is not directly related to the observed welts and scars. Choice D, recent recovery from chickenpox, is also unrelated to the signs of abuse and does not impact the immediate assessment of the child's safety.

Correct Answer: C

Rationale: Following surgery for hypertrophic pyloric stenosis (HPS) in infants, it is appropriate to resume regular formula feeding within 24 hours postoperatively to support recovery. This helps maintain adequate nutrition and hydration for the infant. Choice A is incorrect because thickened formula may not be necessary and could potentially cause issues postoperatively. Choice B is incorrect as withholding feedings for the first 24 hours can lead to nutritional deficiencies and delay recovery. Choice D is inappropriate as additional glucose feedings are not typically indicated postoperatively for infants with HPS and may not provide the necessary nutrition needed for recovery.

Correct Answer: C

Rationale: After surgery for hypertrophic pyloric stenosis (HPS), it is appropriate to resume regular formula feeding within 24 hours postoperatively to promote recovery. Choice A, thickened formula after surgery, may be too heavy for the infant's digestive system at this early stage. Withholding feedings for the first 24 hours (Choice B) is not recommended as early feeding helps with recovery. Additional glucose feedings (Choice D) are not necessary and may not provide the balanced nutrition required after surgery.