Correct Answer: B

Rationale: The combat health support system in the field is primarily designed to project, sustain, and protect the health of soldiers during war and other operations. Choice A is incorrect as it focuses solely on evacuation and delaying return to duty, missing the broader scope of health support. Choice C is incorrect as it only mentions rearward evacuation and reassignment, which is not the sole purpose of the combat health support system. Choice D is also incorrect as it emphasizes far rear area care and delayed return to duty, neglecting the comprehensive nature of health support in combat situations.

Correct Answer: B

Rationale: When collecting a stool specimen, the nurse should usually take about 1 inch of the specimen or a teaspoonful for testing purposes. This amount is sufficient for laboratory analysis and helps ensure accurate results. It is important for the nurse to follow the proper procedure for specimen collection to maintain accuracy in diagnostic testing. Choices A, C, and D are incorrect because they do not provide the correct information on the amount of specimen needed for stool specimen collection.

Correct Answer: D

Rationale: Assisting the client to sit in a chair is a crucial nursing intervention postoperatively. It helps prevent complications such as thrombosis, pneumonia, and pressure ulcers by promoting circulation and aiding in recovery. Changing the infusion rate of the intravenous fluid would require a physician's order and is not within the nurse's independent scope of practice. Encouraging the client to discuss feelings and administering medications for pain management are important interventions but may not be as immediately necessary as assisting the client in mobilizing early postoperatively.

Correct Answer: A

Rationale: Aspirin is best absorbed on an empty stomach to maximize its effectiveness. Taking it with cold water helps in its quick absorption. Option B is incorrect because taking aspirin on a full stomach can delay its absorption. Option C is incorrect as fruit juice may not provide the ideal conditions for absorption. Option D is incorrect as taking aspirin first thing in the morning may not ensure an empty stomach.

Correct Answer: D

Rationale: When palpating the client's neck for lymphadenopathy, the nurse should position herself in front of a sitting client. This positioning allows for easier access to the neck area and better visualization of any swelling or abnormalities in the lymph nodes. Placing oneself in front of the client ensures proper alignment and comfort for both the nurse and the client during the assessment. Choices A, B, and C are incorrect as positioning at the back or sides of the client may hinder proper assessment due to limited visibility and access to the neck area.