On hospital day 6 (illness day 10), a fourth chest radiograph showed basilar streaky opacities in both lungs, a finding consistent with atypical pneumonia (Figure 5), and rales were noted in both lungs on auscultation.

住院第 6 天（发病第 10 天）， 第四次胸片显示双肺底部条纹状混浊， 符合非典型肺炎的表现（图 5）， 听诊时双肺均有罗音。