Correct Answer: A

Rationale: The first sign of puberty in boys is typically the enlargement of the testes. This is due to the increase in production of testosterone, which leads to physical changes such as growth of the testes. Choice B, decreased levels of testosterone, is incorrect as puberty is marked by an increase in testosterone levels. Choice C, voice deepening, and choice D, pubic hair growth, usually occur later in the puberty process compared to testicular enlargement, making them incorrect answers.

Correct Answer: B

Rationale: In the management of acute sickle cell pain crisis in children, morphine is the preferred medication due to its effectiveness in providing pain relief. Meperidine (Demerol) is less commonly used in this scenario because of its potential for neurotoxicity with repeated doses. Acetaminophen (Tylenol) and Ibuprofen (Motrin) are not typically sufficient for managing the severe pain associated with sickle cell crises and are not the first-line treatment options.

Correct Answer: C

Rationale: Pain management is essential postoperatively to reduce crying, which could place strain on the surgical site. Feeding and holding the infant are allowed, but care should be taken to avoid placing pressure on the suture line.

Correct Answer: B

Rationale: Being persistent through 10 to 15 minutes of food refusal is recommended to help increase caloric intake in infants with FTT. Establishing a routine and using developmental stimulation can also be helpful, but the priority is ensuring adequate caloric intake.

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.