1. 關於acute intestinal obstruction，下列敘述何者正確？(1)Hyperparathyroidism可能造成ilues (pseudoobstruction)；(2)Hypokalemia 及hypomagnesemia可能造成ilues；(3)腹腔鏡手術不可能造成obstructive adhesion；(4)Bezoars可能造成acute intestinal obstruction；(5)Ileus發生時，病人通常會有腹脹、絞痛及厲害的嘔吐；(6)遠端大腸發生急性阻塞時，站立的plain films of the abdomen會顯示air-fluid levels於大腸和小腸中 (A) (1)+(2)+(3) (B) (1)+(2)+(4) (C) (2)+(4)+(5) (D) (3)+(5)+(6) (E) (4)+(5)+(6)