NAVLE（北美执业兽医考题）Day 796

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岁的雄性博美犬由于过去3个月持续的喘鸣和明显的呼吸困难就诊。主诉该犬偶尔会出现类似于清喉咙的咳嗽。这个主人是多年的老烟枪。体格检查时，你发现这只狗出现中度的呼吸困难，你为这只狗验了血，拍摄了包含呼气和吸气在内的胸腔X光片如下图。根据这只狗存在的问题，哪项是常用的治疗方案？