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当前学科：口腔执业医师
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患者男，40岁。右上后牙咬物痛已半年，1天前夜间牙痛急诊。检查见银汞充填体边缘有龋，叩痛（+），热测引起剧痛，放散至右颞部。该患牙最可能的诊断是（）
A
继发深龋
B
牙本质过敏
C
可复性牙髓炎
D
慢性闭锁性牙髓炎
E
慢性牙髓炎急性发作
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Dialogue : Beautiful Packing John: Glad to see you again, Sherman. Sherman: Hi, glad to see you too. John: Please, sit down．Would you like to try our new tea? Sherman: Great! The main purpose of my visit today is to place another order of your Longjing tea．Actually, we will place regular orders from now. John: Oh, it is a good news for us．I have the confidence that our tea won't make you disappointed. Sherman: That is true．But before that, I'd like to talk something about the packing of Longjing tea. John: Did you find any problems with the packing? Sherman: No．My meaning is to improve the packing of your Longjing tea．There is no doubt that the quality of your tea is good．It is the packing that often gives the first impression on customers rather than the products themselves so we believe the packing is as important as the quality of the products themselves. John: I agree with you．But could you be in details? Sherman: Sure．Firstly, we believe the out-look of the package should attract customer．A beautiful packing is surely a great help in pushing sales．To be honest, your packing is not attractive enough to buyers. John: Do you mean the color of the design should be more bright and eye-catching7 Sherman: Eye-catching with traditional Chinese style．You see, customers even can smell your culture before they open the box and drink the tea．As you know, one function of packing is to stimulate the buyer's desire to buy. John: I'll pass your idea onto our designers and ask them to improve it. Sherman: Thank you John．Secondly, if it is possible, we would like to advise you to improve your methods of packing. John: Our packing is typical tin for tea．Any questions about this method of packing? Sherman: I am thinking about how to let your packing speak for the good quality of the tea itself．Can we find some other packing ways to show off the appealing green and sl~ape of the tea? John: We can leave an open window on packing. Sherman: You get the point. John: Thanks for your suggestion.