Correct Answer: D

Rationale: When counseling a couple at risk of genetic abnormalities, it is crucial to present information in a nondirective manner. This approach allows the couple to make informed decisions without feeling pressured or influenced. Gathering information from at least three generations (Choice A) may be relevant for genetic counseling but is not the most critical aspect in this scenario. Informing the couple of the need for a wide range of information (Choice B) is too general and does not address the specific approach needed in this situation. Maintaining the confidentiality of the information (Choice C) is important but not the top priority compared to presenting information in a nondirective manner.

Correct Answer: D

Rationale: Left-to-right shunting in a cardiac malformation results in increased blood flow to the lungs. This increased blood flow can lead to pulmonary hypertension and heart failure if left untreated. Elevated hematocrit (Choice A) is not a characteristic directly associated with left-to-right shunting. Severe growth retardation (Choice B) is not a typical manifestation of this type of congenital disorder. Clubbing of the fingers and toes (Choice C) is more commonly seen in conditions like chronic respiratory or cardiac diseases, not specifically with left-to-right shunting and associated cardiac malformations.

Correct Answer: A

Rationale: The correct answer is to maintain a structured routine. Children with autism spectrum disorder benefit from a structured routine as it provides them with stability and predictability, which can help reduce anxiety and improve behavior management. Encouraging social interaction (Choice B) may not be suitable for all children with autism, as some may struggle with social skills. While positive reinforcement (Choice C) is a helpful strategy, maintaining a structured routine is more essential for overall management in children with autism spectrum disorder. Using a communication board (Choice D) may be beneficial for communication, but establishing a structured routine is a foundational strategy that should be prioritized in the discharge teaching for a child with autism spectrum disorder.

Correct Answer: A

Rationale: The correct answer is A. Cystic fibrosis is a genetic disorder that primarily affects the respiratory and digestive systems. It results in the production of thick, sticky mucus that can clog the lungs and obstruct the pancreas. This explanation is crucial for parents to understand the impact of the condition on their child's health. Choice B is incorrect because cystic fibrosis is not an autoimmune disorder. Choice C is partially correct in that cystic fibrosis is a genetic disorder, but it requires a comprehensive management approach beyond just medication. Choice D is incorrect as cystic fibrosis is not caused by prenatal exposure to toxins but rather by inheriting specific genetic mutations.

Correct Answer: B

Rationale: Encouraging deep breathing exercises is important preoperative teaching for a child scheduled for a tonsillectomy. Deep breathing exercises can help the child relax and reduce anxiety, which is beneficial before the procedure. Explaining the procedure in detail might be overwhelming for a 4-year-old, whereas encouraging deep breathing exercises can be more beneficial in promoting relaxation and preparing the child. Discussing the importance of hydration is crucial for postoperative care but may not be the priority for preoperative teaching. Using play therapy can help prepare the child, but encouraging deep breathing exercises is more directly related to relaxation and preparation for the procedure.