The shoes were worn out, what’s more, they aren’t worth _____.

A．to mend

B．mending

C．mended

D．for mending

上消化道出血合并肝性脑病，下列各项中不适用于清除肠内积血，减少血氨形成的是（）

A.弱酸性液灌肠

B.理盐水灌肠

C.乳果糖口服

D.肥皂水灌肠

E.50%硫酸镁口服