Good afternoon. I would like to ask how many days it takes for the chest x-ray to completely improve. We are discharging patients with already negative PCR and with clinical improvement, but radiological alterations persist that we do not know how long it takes for them to disappear. Thank you. I insist, COMPLETE improvement. / 下午好。请问胸片结果需要几 天才会完全恢复正常?我们现在正在对PCR核酸阴性，临床明显改善的患者做出院安排。但是他们胸片中显示肺部还有遗留病灶，而我们不知道多久后这些病灶才会消失?我重申，是 完全恢复正常。谢谢。