Correct Answer: A

Rationale: When assessing a 2-year-old child with abdominal pain and adequate perfusion, it is essential to examine the child in the parent's arms. This approach helps reduce anxiety, provide comfort, and establish trust with the child. Palpating the painful area of the abdomen first (Choice B) may cause discomfort and increase anxiety in the child. Placing the child supine and palpating the abdomen (Choice C) without considering the child's comfort and security may lead to resistance and inaccurate assessment. Separating the child from the parent (Choice D) can exacerbate the child's anxiety and hinder the examination process. Therefore, examining the child in the parent's arms is the most appropriate approach in this scenario.

Correct Answer: C

Rationale: A moist sterile dressing should be used to protect the exposed bladder tissue from infection and injury. Exstrophy of the bladder requires careful management to prevent complications such as infection. A loose diaper (Choice A) may not provide adequate protection or prevent infection. Dry gauze dressing (Choice B) may not be ideal as it could adhere to the exposed area and cause trauma upon removal. Petroleum jelly gauze pad (Choice D) may not be suitable as it can trap moisture and increase the risk of infection.

Correct Answer: D

Rationale: The most accurate way to determine a therapeutic dose for children is based on their weight rather than age. Weight-based dosing helps ensure that the child receives the appropriate amount of medication for their body size, which is crucial for safety and effectiveness. Age-based dosing can lead to underdosing or overdosing, as children of the same age can have significantly different weights. Choice A is incorrect because even small variations in dosages can have significant effects on a child's health. Choice B is incorrect as acetaminophen can be appropriate when used correctly for fever management in children. Choice C is incorrect as children's weights can vary greatly within the same age group, making weight-based dosing more precise and individualized.

Correct Answer: A

Rationale: The correct answer is A: Incisors. In infants, incisors are usually the first teeth to erupt, typically around 6 months of age. These are the front teeth used for cutting food. Canines (Choice B), upper molars (Choice C), and lower molars (Choice D) typically erupt after the incisors. Canines are sharp teeth used for tearing food, while molars are flat teeth used for grinding food.

Correct Answer: B

Rationale: In a child with a disorder of the posterior pituitary gland, desmopressin acetate is commonly used to manage the condition by replacing the antidiuretic hormone. Instructing the parents to administer desmopressin acetate correctly is essential for the child's treatment. The other options are incorrect because growth hormone treatment, stopping treatment at puberty, and reporting signs of acute adrenal crisis are not directly related to managing a disorder of the posterior pituitary gland.