下列哪种情况属于惯常环境（）。
A.到异地谈生意
B.到异地开会
C.到自己别墅小憩
D.到外地串门
参考答案：C
It’s the end of the month and I can hardly make ends meet. , I would buy you a good gift for your birthday.
A．If any
B．If not
C．If ever
D．If so
试述慢性盆腔炎的治疗方法。
