(71) is true regarding simple sort techniques.

A．Both insertion sort and selection sort require O(n)moves.

B．Exchange sort is frequently referred to as a bubble sort.

C．If random data are in an array that is to be sorted, an insertion sort will give the best performance for large elements with small sort items.

D．Exchange sort is the least expensive.

患者女，36岁，因“阵发性腹痛伴黑粪3天”来诊。查体：双下肢可见多发紫癜，两侧膝关节轻度肿胀、活动受限，腹软、右下腹有压痛。实验室检查：血常规：血红蛋白110g/L，白细胞9.6×10⁹/L，血小板103×10⁹/L；尿常规：尿蛋白（+），红细胞（+），透明管型0~2个/HP；血清总补体和C3测定正常。

首先需要鉴别的疾病是（）

A.系统性红斑狼疮

B.类风湿关节炎

C.荨麻疹

D.十二指肠溃疡

E.肝硬化伴消化道出血