硫脲类药物最严重的不良反应是（）
A.药疹
B.消化反应
C.粒细胞减少症
D.甲状腺功能减退
E.转氨酶增高
参考答案：C
解析：硫脲类药物常见的不良反应有瘙痒、药疹等过敏反应，多数情况下不需停药也可消失，最严重不良反应有粒细胞缺乏症，一般发生在治疗后的2-3个月内，故应定期检查血象，特别注意与甲亢本身所引起的白细胞总数偏低相区别，所以答案为C。
When you wave to a friend, you are using sign language. When you smile at someone , you mean to be 16 . When you put one finger in front of your 17 , you mean“Be quiet.” Yet , people in different countries may use different sign languages. Once an Englishman was in Italy. He could speak 18 Italian. One day while he was walking in the street , he felt 19 and went into a restaurant. When the waiter came , the Englishman 20 his mouth , put his fingers into it and took them out again and moved his lips. In this way , he 21 to say , “Bring me something to eat.”But the waiter brought him a lot of things to 22 . First tea , then coffee , then milk , but no food. The Englishman was 23 that he was not able to tell the waiter he was hungry. He was 24 to leave the restaurant when another man came in and put his hands on his stomach. And this sign was 25 enough for the waiter. In a few minutes, the waiter brought him a large plate of bread and meat. At last the Englishman had his meal in the same way.
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