Correct Answer: A

Rationale: Improvement in APIGN is indicated by an increase in urine output and a change in urine color from brown (due to hematuria) to a more normal appearance. This reflects a reduction in glomerular inflammation and improved kidney function. Choice B is incorrect because resting more comfortably is not a direct indicator of kidney function improvement. Choice C is incorrect because a decrease in appetite is not typically associated with improvement in APIGN. Choice D is incorrect because an increased BUN value would suggest worsening kidney function rather than improvement.

Correct Answer: D

Rationale: These behaviors are consistent with FTT and indicate social withdrawal, which is often observed in infants who are not thriving. A wide-eyed gaze and avoidance of eye contact can also indicate developmental delays or emotional disturbances.

Correct Answer: D

Rationale: The correct answer is D because screaming and thrashing his arms and legs are indicative behaviors of discomfort or pain in young children. The child's actions suggest a higher likelihood of experiencing postoperative pain and necessitate further evaluation. Choices A, B, and C do not exhibit overt signs of distress or discomfort associated with pain, making them less likely candidates for postoperative pain assessment.

Correct Answer: C

Rationale: Discussing how the body continuously makes blood helps the child understand that losing a small amount is normal and not harmful. This educational approach also helps reduce anxiety by giving the child a sense of control over the situation.

Correct Answer: D

Rationale: The correct answer is D because sitting steadily typically occurs closer to 6-8 months of age, not 3 or 4 months. Choice A is incorrect because sitting ability and the age of first tooth eruption are not related. Choice B and C are incorrect as most infants do not sit steadily at 3 or 4 months, and it is more common for infants to achieve this milestone around 6-8 months.