【单选题】A 10-year-old boy presents with dyspnea, cyanosis and prolonged expiratory phase after breathing in to cold air. Wheezes are detected to auscultation throughout her lung fields. Which of the following...
【单选题】A 71-year-old woman has smoked a pack of cigarettes per day for 50 years. She has had increasing dyspnea for 12 years. Over the past 3 days she has become febrile, with a pro ductive cough, and severe...