根据数字评分量表（NRS）评估200名晚期癌症患者的疼痛程度。
Evaluate pain degrees of 200 late staged cancer patients against the Numerical Rating Scale (NRS).
按照WHO推荐视觉模拟评分方法评估，采用0～10数字进行镇痛强度分级，完全无痛为0分，难以忍受疼痛为10分；
Visual analogous scale (VAS) suggested by WHO was used to assess. Analgesia intensity expressed with 0-10, 0 point as without pain completely, 10 points as unbearable pain;
按照WHO推荐视觉模拟评分方法评估，采用0～10数字进行镇痛强度分级，完全无痛为0分，难以忍受疼痛为10分；
Visual analogous scale (VAS) suggested by WHO was used to assess. Analgesia intensity expressed with 0-10, 0 point as without pain completely, 10 points as unbearable pain;
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