The client is advised by the physician to have mammography screening annually. Which of the following is the best measure to improve adherence with mammography screening

A．Making sure that the individual barriers to screening are minimized.

B．Emphasizing that mammography screening can prevent breast cancer.

C．Emphasizing that mammography screening is a low-cost approach to cancer prevention.

D．Informing the client that she is at high risk for breast cancer and needs to follow the physician's recommendation.

下列有关实验操作或现象描述错误的是[ ]

A．用玻璃棒蘸取少量试液滴在湿润的pH试纸上，与标准比色卡对照并读出试液的pH

B．用湿润的红色石蕊试纸检验氨气时，试纸变为蓝色

C．向蛋清中滴几滴浓硝酸，微热，出现黄色

D．将碘水滴在馒头片上，出现蓝色