The traffic problems have severely affected economic development. ________ we must spare no   

efforts to solve them. [      ]

A. Furthermore       

B. Therefore                

C. Meanwhile        

D. Nevertheless

下列哪种方法对失眠治疗无效？（）

A.刺激限制治疗

B.睡眠限制治疗

C.认知治疗

D.共情的回应

E.矛盾意向法