The nurse teaches a client about the relationship between body position and gastroesophageal reflux. Which of the following statements by the client would indicate that he understands measures to avoid problems with reflux while sleeping

A. "I can elevate the head of the bed 4 to 6 inches. "
B. "I can elevate the foot of the bed 4 to 6 inches. "
C. "I can sleep on my back without a pillow under my head. "
D. "I can sleep on my stomach with my head turned to the left. "

患者，女，27岁。平时月经40天一行，量少，2天即净，伴经期腹痛，尚能忍受，平时心烦易怒，经前胸胁胀痛，舌淡红，苔薄白，脉弦。诊断为

A．无子

B．断绪

C．月经过少

D．经迟

E．痛经