| ประโยคภาษาจีน : 中文句子 | 
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|  jié lùn结论  huàn bìng患病  nián líng年龄  yǔ与  chuí guǎn椎管  nèi内  hé bìng zhèng合并症  shì是  yǐng xiǎng影响  shǒu shù手术  liáo xiào疗效  de的  zhòng yào重要  yīn sù因素 | 
| Conclusions:①The ages and intro-spinal complications were main causes of the operative result of MED. |