青霉素皮内过敏试验局部反应的阳性体征是（）
A．皮丘隆起，并出现红晕硬块，直径大于1cm，或红晕周围有伪足、痒感
B．试验处皮肤有明显突起的风团或大丘疹，周围充血或不充血
C．皮丘红肿，硬结大于1.5cm，红晕可超过 4cm，有时出现伪足，主诉痒感
D．局部有出血点，直径大于1cm，有丘疹巳局部有白斑、硬块，直径大于1cm
参考答案：A
解析：
青霉素阳性表现是局部皮丘隆起，出现红晕硬块，直径大于1cm，或周围出现伪足、有痒感。
One day a farmer’s donkey fell down into a well. The animal cried ___1___ for hours as the farmer tried to think out ___2___ to do. Finally, he decided the animal was ___3___, and the well needed to be ___4___ up anyway; it just wasn’t ___5___ it to save the donkey. He invited all his ___6___ to come over and help him. They all grabbed（握起）a shovel（铁锹）and began to shovel ___7___ into the well. At first, the donkey ___8___ what was happening and cried horribly(惊恐的,害怕的). Then, to everyone’s ___9___ he quieted down. A few shovel loads later, the farmer finally looked ___10___ the well. He was surprised at what he saw. With each shovel of dirt that hit his back, the donkey was doing something amazing. As the farmer’s neighbours ___11___to shovel dirt on top of the animal, he would ___12__ it off and take a step up. Pretty soon, everyone was amazed as the donkey stepped up over the edge of the well and happily ran off! Life is going to shovel dirt on you, all kinds of dirt. If you want to get out of the well, the ___13___ is to shake it off and take a step up. Each of our troubles is a stepping stone（垫脚石）. We can get out of the ___14___ wells just by not stopping, never ___15___! Shake it off and take a step up.
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