Correct Answer: D

Rationale: The second dose of the hepatitis A vaccine is recommended 6 months after the first dose to ensure full immunity.

Correct Answer: B

Rationale: A neonate normally loses about 10% of the birth weight by age 3 to 4 days. The birth weight is usually regained by the 10th day of life. In this case, the weight loss from 3400 g to 3147 g is within the expected range. Therefore, the most appropriate action is to explain to the mother that this weight loss is within normal limits. Choice A is incorrect because supplemental feedings of formula are not indicated for this expected weight loss in a breastfed newborn. Choice C is incorrect as there is no evidence to suggest excessive weight loss at this point. Choice D is unnecessary at this stage and may not align with the current situation of normal weight loss post-birth.

Correct Answer: D

Rationale: Intense perianal itching is the most common symptom of pinworm infection, especially at night when the female worms lay their eggs

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: B

Rationale: The 'difficult' child is the best way to describe the child in this scenario. This temperament is characterized by high activity levels, irritability, irregular habits, and difficulty adapting to changes. Choice A, the 'easy' child, is known for being generally positive and adaptable. Choice C, the 'slow-to-warm-up' child, typically needs time to adapt to new situations but is not necessarily highly active or irritable. Choice D, the 'fast-to-warm-up' child, adapts quickly to new situations, which contrasts with the child's slow adaptation mentioned in the scenario.