In moderate wind and current what should be the length of chain with a single anchor?（）

A.5 times the depth of the water in good holding ground

B.10 times the depth of the water in shallow water

C.2 times the depth of the water in poor holding ground

D.8 times the depth of the water in deep water

某8岁男孩，一年来时有阵发性腹痛，在脐周部位，多在空腹时发作，食后稍减。食欲不振。面色萎黄，有白斑，形体消瘦，唇内有颗粒样大小白点，舌体有红色刺点，舌苔薄腻。

对于本病的诊断下列哪项最不重要？（）

A.望诊

B.问诊

C.闻诊

D.切诊

E.查大便