To obtain a good monitor tracing on a client in labor, the mother lies on her back. Suddenly, she complains of feeling light-headed and becomes diaphoretic. Which of the following should be the nurse's first action

A．Reposition the client to her left side.

B．Immediately take the client's blood pressure and call the physician.

C．Start oxygen at 6 L via nasal cannula.

D．Increase the IV fluids to correct the client's dehydration.

肺结核患者，痰菌阴性时，下列哪些是错误的：（）

A.肺内病灶具有活动性，需化疗

B.需接种卡介苗

C.结核病传染源的痰液需作无菌处理

D.需作结核菌素试验

E.痰菌阳性的患者应行呼吸道隔离