A client who is planning a pregnancy asks the nurse about ways to promote a healthy pregnancy. Which of the following would be the nurse’s best response

A. "Pregnancy is a human process; you don’t have to worry. "
B. "You practice good health habits; just follow them and you’ll be fine. "
C. "There is nothing you can do to have a healthy pregnaney; it’s all up to nature. "
D. "Folic acid, 400 mcg(1mcg= 10μg), improves pregnancy outcomes by preventing certain complications. "

电气设备检修时需要对检修设备解锁操作，应经（）专责批准，（）、（）到场监护下进行。