Patients with gastrointestinal cancers experience diurnal variations in fatigue severity during chemotherapy that decrease their functional status and quality of life.

中文翻译：

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接受化疗的胃肠道癌症患者早晨和晚上同时出现的不同的疲劳特征。

胃肠道癌症患者在化疗期间疲劳严重程度会出现昼夜变化，这会降低他们的功能状态和生活质量。