Correct Answer: A

Rationale: Persistent fatigue lasting more than 6 months is a diagnostic criterion for chronic fatigue syndrome, characterized by debilitating fatigue not relieved by rest.
Choice B is incorrect because joint swelling is not a feature of chronic fatigue syndrome; it is more associated with inflammatory conditions like rheumatoid arthritis.
Choice C is incorrect because a fever of 38.5°C is not typical unless an infection is present; low-grade fevers may occur but are not primary.
Choice D is incorrect because weight gain is not a hallmark feature; weight changes may occur secondary to inactivity or medication.

Correct Answer: B

Rationale: Avoiding direct sunlight is critical while taking ciprofloxacin, a fluoroquinolone, as it can cause photosensitivity, leading to severe sunburn or rash.
Choice A is incorrect because dairy products can reduce ciprofloxacin absorption by binding to the drug; it should be taken 2 hours before or 6 hours after dairy.
Choice C is incorrect because ciprofloxacin tablets should not be crushed, as this can alter their release mechanism; a liquid form is available if swallowing is difficult.
Choice D is incorrect because antacids (containing calcium, magnesium, or aluminum) can decrease ciprofloxacin absorption and should be avoided within 2 hours of the dose.

Correct Answer: C

Rationale:
Choice A is wrong because checking a STAT cardiac troponin is not the first priority. Cardiac troponin is a biomarker that indicates myocardial injury, but it may not rise until several hours after the onset of chest pain.
Therefore, it is not useful for immediate diagnosis or treatment of acute coronary syndrome.
Choice B is wrong because requesting a prescription for a beta-blocker is not the first priority. Beta-blockers are medications that can lower blood pressure and heart rate, and reduce the oxygen demand of the heart. They can prevent or reduce the recurrence of chest pain and complications of acute coronary syndrome, but they are not indicated for immediate relief of chest pain. Nitroglycerin is a vasodilator that can relieve chest pain caused by myocardial ischemia. The nurse should administer it as soon as possible to improve blood flow to the heart and reduce the risk of myocardial infarction. The nurse should also monitor the client's blood pressure and heart rate after giving nitroglycerin, as it can cause hypotension and reflex tachycardia.
Choice D is wrong because administering oxygen is not the first priority. Oxygen therapy can increase the oxygen supply to the heart and reduce ischemia, but it is not necessary for all clients with chest pain. Oxygen therapy should be based on the client's oxygen saturation level and clinical condition. If the client's oxygen saturation is normal or high, oxygen therapy may not be beneficial and may even be harmful.

Correct Answer: D

Rationale:
Choice A is wrong because swaddling the newborn with his legs extended can increase muscle tension and discomfort. Swaddling should be done with the legs flexed and hips abducted to prevent hip dysplasia.
Choice B is wrong because administering naloxone to the newborn can cause severe withdrawal symptoms and respiratory depression. Naloxone is an opioid antagonist that reverses the effects of opioids, but it is not recommended for newborns with NAS unless they have life-threatening respiratory depression.
Choice C is wrong because maintaining eye contact with the newborn during feedings can overstimulate the newborn and cause agitation. Eye contact should be avoided or limited during feedings for newborns with NAS. This is because neonatal abstinence syndrome (NAS) is a condition that affects newborns who are exposed to opioids or other addictive substances in the womb. These substances can cause withdrawal symptoms in the newborns, such as excessive crying, tremors, vomiting, diarrhea, and seizures. Minimizing noise and other stimuli can help calm the newborn and reduce stress.

Correct Answer: C

Rationale: Orthopnea is expected in heart failure due to fluid overload. Tachycardia, weight gain, and productive cough are more common.