21.   Colon and rectal cancer is the second leading cause of cancer deaths in the United States after lung cancer.

22.   People whose diets include large amounts of fat from meat, the report says, face a higher risk of colon and rectal cancer.

a. + cancer >>共 561
prostate 31.20%
ovarian 6.60%
cervical 4.96%
liver 4.58%
pancreatic 4.32%
testicular 3.69%
colorectal 3.10%
terminal 1.86%
new 1.46%
uterine 1.42%
rectal 0.43%
rectal + n. >>共 70
cancer 10.84%
exam 8.37%
distension 6.40%
thermometer 4.93%
contraction 4.43%
wall 4.43%
sensation 3.94%
mucosa 3.94%
value 3.94%
examination 3.45%
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