是呼吸音还是透光度？谢谢

A 52 year old non-smoker female, solicitor by profession, presented with worsening breathlessness and pain (intensity 7/10) on the left side of the neck, chest and left scapular region sometimes radiating to the head causing headaches. She also described dysphagia forfluids but not solids and worsening breathlessness on exertion. Initial observations were in normal limits. There was reduced air entry in the left lung base. Bloods were unremarkable except for a raised CRP of 36 (normal range 0-6). Chest x-ray showed a large left pleural effusion (Fig. 1). A CT chest confirmed an irregular mass in the superior mediastinum associated with left brachiocephalic and jugular vein thrombosis (Fig. 2). The patient underwent local anaesthetic medical thoracoscopy, drainage of pleuralfluid and intercostal chest drain insertion. 1300 ml of orange colouredfluid was drained (Fig. 3). Biochemical analysis identified high levels of triglycerides, suggesting a chylothorax. Subsequent CT guided biopsy and histological analysis showed features consistent with small cell lung cancer (Supplementary Material). The patient was treated with 5 cycles of radiotherapy and carboplatin and etoposide but continued to deteriorate and passed away.

52岁女性律师、不吸烟，表现为恶化的呼吸急促和左颈胸部和左肩胛区的疼痛（强度7/10），疼痛有时会放射至头部而引起头痛。并伴有进食液体时吞咽困难和恶化的劳力性呼吸急促。除左肺底部呼吸音轻，余初步体格检查在正常范围。血液检查除CRP升高至36（正常范围0-6）外，余无明显异常。胸片显示左侧大量胸腔积液（图1），胸部CT证实上纵隔不规则肿块伴左头臂和颈静脉血栓（图2）。患者局部麻醉下行胸腔镜检查、肋间胸腔置管和胸腔积液引流，共引流出1300 mL橙色液体（图3）。胸腔积液的生化分析提示符合乳糜胸诊断的高水平甘油三酯。随后在CT引导下活检和组织学分析显示小细胞肺癌的特征（见补充材料）。患者接受了5个周期的放疗以及卡铂和依托泊苷的药物治疗，但病情继续恶化后去世。

observation是体格检查吗？

There was reduced air entry in the left lung base. “左肺底部呼吸音轻”还是“左肺底透光度减低”

谢谢