NAVLE（北美执业兽医考题）Day 537

A 10-year-old male Pomeranian presents to you with a 3-month history of wheezing and marked respiratory distress. The owner reports that he has been coughing sporadically as if trying to clear his throat of a hairball. The owner is a regular smoker. On your examination, the dog displays moderate expiratory difficulty. You submit blood work and take radiographs including inspiratory and expiratory lateral projections of the dog, which are shown below. Which of the following are commonly used to treat the likely condition?

一只10岁的博美犬由于持续3个月的喘鸣以及明显的呼吸困难前来就诊。主诉他偶尔会像清嗓子中毛发那样的咳嗽。主人是个老烟枪。体格检查时这只狗出现中度的呼气困难。你安排了血检和该犬胸腔呼气，吸气时的侧位片，如下图所示。以下哪个选项是常用于治疗该病的药物？