Correct Answer: C

Rationale: PCA pumps are designed to deliver both a continuous baseline dose and patient-activated bolus doses, which can help manage pain effectively while minimizing the risk of overdose.

Correct Answer: D

Rationale: The correct answer is D: Closely monitor abdominal distention. Monitoring the abdomen for signs of distention is crucial in the early detection of necrotizing enterocolitis (NEC). In NEC, the bowel wall is edematous and breaking down, leading to abdominal distention. Holding feedings is important in the management of NEC, as feedings may need to be stopped temporarily. Checking gastric residuals before feedings helps in assessing the infant's tolerance to feedings. Taking rectal temperatures is contraindicated in NEC as it can lead to the perforation of the bowel.

Correct Answer: A

Rationale: The correct answer is A. Iron supplements can cause stools to turn black, which is a normal and harmless side effect. Iron is best absorbed on an empty stomach, although it can be given with food if gastrointestinal upset occurs. Vitamin C, not D, enhances iron absorption. Choice B is incorrect because Vitamin C enhances iron absorption, not Vitamin D. Choice C is incorrect as there is no need to mix liquid iron with saliva before swallowing. Choice D is incorrect because iron is best absorbed on an empty stomach.

Correct Answer: A

Rationale: A well-defined light reflex, a small concave spot, and a grayish, nontransparent tympanic membrane are normal findings during an otoscopic examination in a child.

Correct Answer: D

Rationale: The correct order for abdominal examination is inspection, auscult