若小船在静水中运动的最大速度为4m/s，则它在水流速度为3m/s的河中航行时，相对于河岸的最大速度为（　　）

A．1m/s

B．4m/s

C．5m/s

D．7m/s

The nurse is caring for a client who underwent a subtotal gastrectomy. To manage dumping syndrome, the nurse should advise the client to

A．restrict fluid intake to 1 qt (1,000 mL)/day.

B．drink liquids only with meals.

C．don't drink liquids 2 hours before meals.

D．drink liquids only between meals.