名词
中文翻译：Unknown
同义词：
['rectum', 'prostate例句：1. The doctor performed a biopsy on the rectum to check for cancer.（医生对直肠进行了活组织检查，以检查是否有癌症。）']
例句：
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1. The doctor performed a biopsy on the rectum to check for cancer.
医生对直肠进行了活组织检查，以检查是否有癌症。
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2.The patient had a colonoscopy to examine the rectum.
患者进行了结肠镜检查，以检查直肠。
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3.The rectum is a crucial part of the digestive system that helps with the absorption of nutrients.
直肠是消化系统的关键部分，有助于营养物质的吸收。