Correct Answer: A

Rationale: The correct answer is A because a positive diagnosis for HIV infection is confirmed through laboratory testing, specifically the ELISA and Western blot tests. These tests detect the presence of HIV antibodies in the blood, providing definitive evidence of the infection. Choice B is incorrect as weight loss and fever are symptoms but not diagnostic criteria. Choice C is incorrect as opportunistic infections are a consequence of HIV, not the diagnostic criteria. Choice D is incomplete and irrelevant. In summary, the key to diagnosing HIV is through positive laboratory tests, not just based on symptoms or associated infections.

Correct Answer: D

Rationale: The correct answer is D because developing a standard formal nursing diagnosis helps nurses focus on their scope of practice, which involves identifying and addressing the patient's nursing care needs. By formulating a specific nursing diagnosis, nurses can prioritize interventions and provide individualized care. Choice A is incorrect as nursing diagnoses are not exclusive to nurses. Choice B is incorrect because nursing and physician roles overlap. Choice C is incorrect as clinical judgment should be based on evidence and critical thinking, not solely on intuition.

Correct Answer: D

Rationale: The correct answer is D: high calorie high protein. In COPD exacerbation, the body requires extra calories and protein for energy and muscle strength. High-calorie foods help combat weight loss and fatigue. High-protein foods aid in muscle repair and maintenance. Low-fat low-cholesterol (A) is not ideal as healthy fats are needed. Low-sodium (B) is not necessary unless there is concurrent heart failure. Bland soft diet (C) is not suitable as it does not provide enough calories and protein needed for COPD exacerbation.

Correct Answer: A

Rationale: The correct answer is A because providing clear liquids only until the patient can swallow solid foods is not a recommended nursing intervention to prevent aspiration. Clear liquids do not require the same level of swallowing coordination as solid foods, so it may not help improve swallowing ability. B: Having the patient swallow twice after each bite can help clear the throat and reduce the risk of aspiration. C: Placing food on the unaffected side of the mouth can help direct the food towards the stronger side for swallowing. D: Checking the patient's mouth for pocketing of food is important to ensure that food is not being retained in the mouth, which could lead to aspiration.

Correct Answer: A

Rationale: The correct answer is A: Prostate-specific antigen, which is used to screen for prostate cancer. PSA is a protein produced by the prostate gland, and elevated levels may indicate prostate cancer. Choice B is incorrect as PSA is specific to the prostate, not protein levels. Choice C is incorrect as pneumococcal strep antigen is related to pneumonia, not PSA. Choice D is incorrect as Papanicolua-specific antigen is not a recognized term, and PSA is not used to screen for cervical cancer.