醋酸白试验使用的冰醋酸浓度为（） A.1% B.5% C.10% D.50%

My first reaction was annoyance. It was Friday afternoon, and I was within an hour of finishing my work for the week. As I was leaving, a nurse brought me one more patient message. The statement read: "Mm. Jones called to say that she has had blurred vision （视觉模糊） ever since her medical test this morning." I smiled.  Suddenly our tests were causing eye problems.

This week my patients had questioned everything. My patient with high blood pressure had stopped coming to her treatment on the advice of an Internet chat room. A woman who had a mental problem was substituting （用......代替） St. John’s word for her medication. Now Mrs. Jones was imagining problems. I rolled my eyes.

My second reaction was worry. As I looked through her record, I tried to figure out why she would have blurred vision, but nothing in her record explained the new problem. She’s probably just anxious, I thought. Still, she wouldn't have called if she had been all right. I picked up the phone.

What I next felt can only be described as delight. Before I made the call, the nurse ran in: Mrs. Jones called. Her vision is fine. Turns out she picked up the wrong glasses when she left the office. The X-ray technician has been having the same problem. I let out a laugh. Mrs. Jones had been right. Her vision had been blurred. Now we know why.

Finally I felt shame. I came to realize what Mrs. Jones had taught me. I had first known she was wrong, that her anxiety had clouded hex judgment. Instead, my medical training had clouded mine. Now I feel thankful that Mrs. Jones figured it out before I made a mistake about our relationship. Patients come to me for my help. They pay me to listen, diagnose （诊断）, treat and talk. That suggests trust; I must remember that, and trust them too.               

61. The writer smiled while reading the patient message because he knew_____.

A. Mrs. Jones would ask for more tests

B. the patient was being unreasonable

C. the nurse was joking with him

D. Mrs. Jones would call him

62. What has caused Mrs. Jones’ eye problem? 

A. Wrong glasses.         B. Medical checkup.

C. Her own imagination.                  D. Chatting on the Internet.

63. The underlined words "clouded her judgment" in the last paragraph probably mean_______.

A. made her less trustful toward the doctor

B. put her in control of her own feelings

C. made her less able to think clearly

D. put her in a dangerous situation

在关系模型中，若属性A是关系R的主码，则在R的任何元组中，属性A的取值都不允许为空，这种约束称为 【7】 规则。

患者男性，52岁，会计师，1年来间断出现短暂性左侧肢体麻木、无力，持续数分钟后可自行缓解，偶伴有头晕不适。有"高血压病"病史10余年，自行服药控制良好。查体：血压140/85mmHg，左侧肢体肌力Ⅳ级，感觉正常，肌张力正常，病理征阴性。头颅CT检查提示右侧基底节区腔隙性梗塞。

若检查确定右侧大脑中动脉狭窄，需要手术干预的狭窄标准为（）

A.25%

B.50%

C.70%

D.90%

E.95%

图为经纬网图，已知图中相邻两条纬线间的纬度间隔为10°，读图，回答下列小题。

A点在B点（）方向。

A．西南

B．西北

C．东南

D．东北