Correct Answer: D

Rationale: After an acute myocardial infarction, cardiac rehabilitation is crucial for the client's recovery. It helps improve the client's overall cardiovascular health, reduces the risk of future cardiac events, and promotes a healthy lifestyle. The other options do not directly address the importance of cardiac rehabilitation in the client's recovery process.

Correct Answer: A

Rationale: Substernal retractions are a concerning sign of respiratory distress and can indicate acute chest syndrome, a severe complication of sickle-cell anemia. It results from vaso-occlusion in the pulmonary vasculature, leading to impaired oxygenation. Prompt reporting of this symptom is crucial for early intervention to prevent further complications. Hematuria, a high temperature, and sneezing are not specific manifestations of acute chest syndrome and would not warrant immediate notification to the provider in this context.

Correct Answer: A

Rationale: When a client in a seclusion room following violent behavior continues to display aggression, it is essential for the nurse to confront the client about this behavior. Confrontation can help set boundaries, address the behavior, and ensure the safety of both the client and the healthcare team. Expressing sympathy (Choice B) may not address the immediate need for behavior management. Speaking assertively (Choice C) can be important but should be coupled with addressing the specific behavior. Standing within close proximity (Choice D) of an aggressive client can escalate the situation and compromise safety, so it is not the appropriate action to take.

Correct Answer: A

Rationale: Generalized petechiae and ecchymoses can indicate a potential issue with platelet function or count. Therefore, the most relevant laboratory test to evaluate this condition would be a platelet count. Platelet count helps assess the number of platelets in the blood, which are crucial for clotting and preventing bleeding. Monitoring platelet levels can provide important information about a client's bleeding risk and overall hematologic health.

Correct Answer: B

Rationale: CINAHL (Cumulative Index to Nursing and Allied Health Literature) is a comprehensive database that specializes in nursing and allied health literature. It is a valuable resource for healthcare professionals seeking nursing-related articles, making it the most appropriate option for the nurse caring for a client with questions about pancreatic cancer.