Correct Answer: D

Rationale: Standard precautions are necessary when dealing with blood, body fluids, and potentially infectious materials. They are not required for routine administration of oral medications unless there is a potential exposure risk.

Correct Answer: D

Rationale: Having six teeth at 6 months is earlier than the typical tooth eruption schedule, but it is not unusual or dangerous. It is within the range of normal variations in infant development.

Correct Answer: D

Rationale: Encouraging the baby to fall asleep in the crib while still awake can help establish healthy sleep habits and reduce night waking.

Correct Answer: C

Rationale: By 6 months, infants are usually in the stage of secondary circular reactions, where they start to intentionally repeat actions that bring pleasure or interesting results.

Correct Answer: D

Rationale: The correct answer is D: 'Avoid giving citrus juice.' Citrus juice can irritate the throat after a tonsillectomy, so it should be avoided. Choice A is incorrect because blowing the nose gently is not a recommended intervention following a tonsillectomy. Choice B is incorrect as mucus in emesis is not uncommon postoperatively and does not necessarily require physician notification. Choice C is incorrect as positioning the child supine immediately postoperatively can increase the risk of airway obstruction and should be avoided.