【答案解析】[解析] 从文章(The local doctor sent Yu to a large city for further medical examination．)我们看出，当地的医生将她送往大医院去，就说明她的病情非常严重了。而且得到的消息非常令人震惊(What she got there was very shocking：)医生说她的所有肌肉都要萎缩(all her muscles would waste away and she was dying)而且她已经处在病危中了，所以应该选[C]。