按原文内容填空，并解释画线的语句。     

弈秋，                         。①使弈秋诲二人弈，其一人               ，②惟弈秋之为听；一人虽听之，一心以为有              ，思援弓缴而射之。③虽与之俱学，                                。④为是                       ？ 曰：非然也。

 ①                                                                                      

 ②                                                                                       

 ③                                                                                      

 ④                                                                                      

患者，男，45岁。肥胖体形，无症状，健康查体时发现尿糖阳性。空腹血糖稍高，葡萄糖耐量减低。其诊断是（）

A.2型糖尿病

B.1型糖尿病

C.糖尿病酮症酸中毒

D.肾炎

E.肾病