女性，45岁，幽门梗阻行持续胃肠减压半月余，每日补10％葡萄糖2500ml，5％葡萄糖盐水1000ml，10％氯化钾30ml。2天前开始出现全腹膨胀，无压痛及反跳痛，肠鸣音消失，每日尿量1500ml左右，最可能的原因是
A．低钾血症
B．低钠血症
C．高钾血症
D．高钠血症
E．低钙血症
参考答案：A
解析：低钾血症时最早出现肌无力，先从四肢肌，逐渐延及躯干和呼吸肌。有时有吞咽困难、进食及饮水呛咳，可有软瘫、腱反射减弱或消失；有口苦、恶心、呕吐和肠麻痹等；心脏受累主要表现为传导和节律异常；典型的心电图改变为：早期出现T波降低、变宽、双相或倒置；随后出现ST段降低、QT间期延长和u波；患者可出现低钾性碱中毒症状，但尿呈酸性(反常性酸性尿)。
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| Once upon a time, there was an island where all the feelings lived: Happiness, Sadness, Knowledge, and all of the others, including __1 __. One day it was announced to the feelings that the island would __2___, so all constructed boats and left, except Love. Love was the __3___ one who stayed until the last possible moment. When the island had almost sunk, Love decided to ask for __ 4_ _. Richness was ___5___ Love in a grand boat. Love said, "Richness, can you take me with you? " Richness answered, "No, I can't. There is a lot of __ 6___ and silver in my boat. There is no __7__ here for you." Love decided to ask Vanity(??) who was __8___ passing by in a beautiful vessel(嘞). "Vanity, please help me!" "I can't help you, Love. You are all wet and might _9___ my boat," Vanity answered. Just then Sadness was ___10__, so Love asked, "Sadness, let me go with you." "Oh…Love, I am so __11___ that I need to be by myself!" Happiness passed by Love, too, but she was so __12___ that she did not even ___13__ Love when Love called her. Suddenly, there was a voice, "Come, Love, I will __14__ you." It was a(n) __15___. So blessed and overjoyed, Love even forgot to ask the elder ___16__ they were going. When they arrived at dry __17___, the elder went her own way. ___18__ how much was owed the elder, Love asked Knowledge, another elder, "Who helped me?" "It was ___19__," Knowledge answered. "Time?" asked Love. "But why did Time help me?" Knowledge __20___ with deep wisdom and answered, "Because only Time is able to understand how valuable Love is!" | ||||
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