此次疾病流行的传播途径最有可能是
A．接触疫水
B．苍蝇
C．注射途径
D．水源或食物污染
E．密切接触
参考答案：D
永久性房颤需要用华法林抗凝，调整INR到1．5～3．5，孤立性房颤可以不予抗凝治疗或予以阿司匹林口服。
Liu Hua often helps her sister __________ lessons.[ ]
A. with his
B. for her
C. with her
D. of her
