Correct Answer: D

Rationale: The correct answer is D. Vaso-occlusive crises in sickle cell anemia are characterized by painful swelling of the joints in the hands and feet (hand-foot syndrome) and tissue engorgement due to the obstruction of blood flow by sickled cells. Choices A, B, and C are incorrect because circulatory collapse, hypovolemia, cardiomegaly, systolic murmur, hepatomegaly, and intrahepatic cholestasis are not typically associated with an acute vaso-occlusive crisis in sickle cell anemia.

Correct Answer: C

Rationale: For a conscious child with mild hypoglycemia, giving 15 grams of fast-acting carbohydrates is the appropriate intervention. This can quickly raise blood glucose levels to prevent further complications. Administering insulin (Choice A) would further lower the glucose level, which is not suitable in this scenario. Administering epinephrine (Choice B) is not indicated for hypoglycemia. Glucagon (Choice D) is used for severe hypoglycemia with altered consciousness, not for mild cases where the child is awake and alert.

Correct Answer: C

Rationale: For severe postoperative pain, a preventive around-the-clock schedule is necessary to prevent decreased plasma levels of medications. Providing only an opioid analgesic at this time may not be sufficient for effective pain management. Increasing the dosage without an order is unsafe and may lead to oversedation. Planning a preventive schedule of pain medication around the clock ensures consistent pain relief and better management. Giving the child a clock and explaining when they can have pain medications may increase the child's focus on waiting for relief rather than addressing the pain promptly, making it a less effective strategy.

Correct Answer: C

Rationale: The correct answer is C: Decentering. Decentering is the ability to consider multiple aspects of a situation, which the child's question demonstrates. In this scenario, the child's question shows that she is thinking beyond her own experience and considering the difficulty or complexity of giving an injection from the nurse's perspective. Choices A, B, and D are incorrect. Conservation refers to understanding that certain properties of an object remain the same despite changes in its appearance. Accommodation is the process of adjusting existing knowledge or creating new mental categories to incorporate new information. Class inclusion involves understanding the relationship between a whole set and its subsets, which is not demonstrated in the child's question.

Correct Answer: D

Rationale: The correct answer is D: Chronic hypoxia and iron overload. Children with Beta-thalassemia often suffer from chronic hypoxia due to ineffective erythropoiesis and require frequent blood transfusions, leading to iron overload. These complications must be managed to prevent organ damage. Choices A, B, and C are incorrect. Hypertrophy of the thyroid, polycythemia vera, and thrombocytopenia are not direct risk factors associated with Beta-thalassemia. Therefore, they should not be included in the teaching regarding this condition.