杨先生在工地上干活儿时感到身体不舒服,他到医院就诊后请假回宿舍休息。当天下午,杨先生乘长途车回外地老家,于当晚8点到乡卫生院就诊,经CT检查没有发现较大异常,被初步诊断为短暂性脑缺血。第二天上午,杨先生病情加重,他再次到 Mr. Yang felt uncomfortable when he was working on the jobsite. When he went to the hospital for treatment, he requested leave to rest in the dormitory. On the afternoon of the same day, Mr. Yang took the long-distance bus back to his hometown abroad and visited the township hospital at 8 o’clock that night. No major abnormalities were found after CT examination and was initially diagnosed as transient ischemic attack. The next morning, Mr. Yang exacerbated, he again