儿童便血,大便次数和性质无明显改变者。其为()
A.内痔
B.肛裂
C.直肠息肉
D.锁肛痔
E.溃疡性结肠炎
参考答案:C
--Thanks a lot. -- . Which is not right?
A.No thanks
B.That’s right
C.No problem
D.You’re welcome