某患者由印尼入境后2天，频繁腹泻，无腹痛及里急后重，伴有呕吐。最重要的检查是（）。

A.血常规

B.尿常规

C.电解质

D.泻吐物悬滴检查

E.以上均非

The nurse has been teaching the client strategies to prevent a recurrence of hemorrhoids. One strategy is maintaining a high-fiber diet. Which of the following breakfast menus is appropriate for the client

A．Danish pastry, prune juice, coffee, and milk.

B．Oatmeal, milk, grapefruit wedges, and bran muffin.

C．Corn flakes, milk, white toast, and orange juice.

D．Scrambled eggs, bacon, English muffin, and apple juice.