Of the following signs and symptoms of bowel obstruction, which is related primarily to small bowel obstruction rather than large bowel obstruction

A．Profuse vomiting.

B．Cramping abdominal pain.

C．Abdominal distention.

D．High-pitched bowel sounds above the obstruction.

苏轼有一次问一个善歌的人：“我词比柳（永）词何如？”那人答道：“柳郎中词，只好十七八女孩儿，执红牙拍板唱‘杨柳岸晓风残月’。学士词，须关西大汉执铁板唱‘大江东去’。”苏轼暗暗点头，主要是因为（）

A.被人恭维

B.准确理解了两人的词风

C.扬苏贬柳

D.广为流传