He never complains about the difficulties he has in life．   ，he always has ways to overcome them．

A．However

B．Otherwise

C．Instead

D．Therefore

下列疾病无管型尿的是()

A．肾病综合征

B．急性肾盂肾炎

C．急性膀胱炎

D．急性肾小球肾炎

E．急进性肾炎