问题 单项选择题

患者,女性,22岁,右眼连续戴角膜接触镜2周,出现眼红、眼痛、视力下降11天。眼部检查:右眼视力F.C./30mm,眼睑红肿(+++),睑痉挛(+++),混合充血(+++),角膜中央部见7mm×7mm环形浸润,角膜后弹力层皱折和2mm黄白色前房积脓。为明确诊断,下述哪项检查最有意义()

A.病灶刮片镜检、培养或组织活检

B.共焦显微镜检测

C.PCR技术等免疫学检测

D.眼部B型超声波检查

E.使用敏感抗生素试验性治疗,观察对治疗的反应

答案

参考答案:A

解析:戴角膜接触镜后发生的角膜炎可以是细菌性、真菌性、棘阿米巴性等不同类型角膜炎。题干中提供的信息,尚不足对病因作出诊断。考生应当掌握,直接检测病原体,是感染性角膜炎病因诊断的最有力依据。因此,正确答案为A。其他备选答案要么不准确,要么与病因诊断无关,都是干扰答案。

选择题
阅读理解

阅读理解。

     Tess, eight, always heard her parents talking about her brother, Andrew. He was very sick and they were

completely out of money. Only a very costly surgery could save him but no one would lend them money. She

heard Daddy said with desperation, "Only a miracle can save him."

     Counting all her coins in her bedroom and carefully bringing the coins, Tess slipped out the door and made

her way six blocks to Drug Store. She waited patiently for the pharmacist (药剂师) to give her some attention

but he was too busy at this moment. Tess twisted her feet to make a noise. Nothing. She cleared her throat

with the most disgusting sound she could produce. No good. Finally she took a coin and banged (发出砰声)

it on the counter. That did it! "And what do you want?" the pharmacist asked. "I'm talking to my brother from

Chicago whom I haven't seen for ages," he said without waiting for a reply to his question. "Well, let's talk

about my brother," Tess answered. "He's really, really sick and I want to buy a miracle." 

     ''Pardon?" said the pharmacist, "Andrew has something bad growing inside his head and my Daddy says

only a miracle can save him now. So how much does a miracle cost?" "No miracle here." the pharmacist said.

"Please, just tell me how much it costs." Tess pleaded. The pharmacist's brother bent down and asked, "What

kind of a miracle does your brother need?". "I don't know," Tess replied. "Ijust know he's really'sick and

Mommy says he needs an operation." "How much do you have?" asked the man from Chicago. "One dollar and

eleven cents." Tess answered shyly. "Well, what a coincidence (巧合)!" smiled the man, "That's the exact price.

Take me to where you live. Let's see if I have the kind of miracle you need."

     That man was Mr. Carlton. The operation was completed without charge and soon Andrew was home again 

     "That surgery," her Mom whispered, "was a real miracle. I wonder how much it would have cost?" Tess

smiled. She knew exactly how much a miracle cost.

1. According to the passage, which of the following statements is TRUE? [ ]

A. A miracle costs one point eleven dollars plus the faith of a little child.

B. Tess tried once to get the attention from the pharmacist but failed.

C. Tess's brother, Andrew, didn't survive the operation.

D. Tess is very brave to walk 5 blocks to the drug store to get help.

2. From the passage, you may see Mr. Carlton is _____. [ ]

A. a pharmacist

B. a policeman

C. a teacher

D. a surgeon

3. What was the pharmacist's attitude towards the girl when she tried to get his attention? [ ]

A. delighted

B. impatient

C. nervous

D. anxious

4. Which of the following proverbs best describes what happened in the story? [ ]

A. Nothing is impossible to a willing heart.

B. Two heads are better than one.

C. The early bird catches the worm.

D. Behind bad luck comes good luck.