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46岁男性，腰痛伴右下肢放射痛3个月，反复发作，与劳累有关，咳嗽，用力排便时可加重疼痛。查体：右直腿抬高试验30°阳性，加强试验阳性，X线片示： L4～5椎间隙变窄。 其最可能的诊断为
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As she walked round the large shop, Edith realized how difficult it was to choose a suitable Christmas (36) for her father. She (37) that he were as easy to please as her mother, who was (38) satisfied with perfume. (39) , shopping at this time of the year was a most (40) job. People (41) on your feet, pushed you with their shoulders and almost (42) you over in their hurry in order to (43) something cheap ahead of you. Partly to have a rest, Edith paused in front of a counter, where some beautiful ties were on (44) . "They are (45) silk," the shop assistant told her with a smile trying to (46) her to buy one. But Edith knew from past (47) that her choice of ties hardly ever pleased her father. She moved on slowly and then, quite by chance, (48) where a small crowd of men had gathered round a counter. She found some fine pipes on sale and the (49) were very beautiful. Edith did not hesitate for long. Although her father (50) smoked a pipe once in a while, she believed this was (51) to please him. When she got home, with her small but (52) present hidden in her handbag, it was time for supper and her parents were already (53) table. Her mother was in great (54) . "Your father has at last decided to stop smoking," she told her daughter happily. Edith was so (55) that she could not say a single word.
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