Conclusion: Cochlear implant and speech training can compensate prelingual deaf children's hearing and increase their speech expression ability.

结论：人工耳蜗植入术加术后言语训练，能达到改善听力，提高语言能力的目的。

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Conclusion the mutations in GJB2 are the major cause of prelingual deafness; two causative mutations can be found in (28.6%) prelingual recessive and in (18.9%) prelingual sporadic NSHL patients.

结论GJB2突变是导致学语前聋的主要原因，28.6%的学语前隐性和18.9%学语前散发非综合征性耳聋病人携带了两个GJB2突变。

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