英语语法分析

PURPOSE: The major cause of death in aggressive lymphoma is relapse or nonresponse to initial therapy.

目的：侵袭性淋巴瘤的主要致死原因是复发或对初始疗法无应答。

As one of the difficult items in sampling survey, nonresponse directly affects the precision of the survey.

无回答问题是抽样调查中的难点之一，它的出现直接影响着估计的精度。

Multivariable analysis was performed to determine which factors were independently associated with BMD nonresponse.

我们采用多变量分析来验证哪些因子与骨密度的无反应性相关。