Water is (41) important of all the things we (42) and drink. Not many people understand this, (43) it’s quite true. The human body (人体) can go (44) food for a long time, but two (45) three days without water can usually (46) people die.
Many people don’ t understand how much water the human body needs to work well and many people do not drink (47) , even (48) hot weather.
Our body is (49) water, about 65% to 75%, ff we do not have enough water, we’ll (50) tired and many will get ill. So you see, how important water is to us all.

[A] and [B] but [C] because

47岁，月经不规律伴经量增多2年。本次停经3个月后出血已12天，量仍多，今以出血多伴头晕就诊。妇科检查： * * 内有多量鲜血和血块，宫颈光滑，宫体大小正常，附件无异常。首选的诊疗措施是（）

A.止血药和抗生素静脉滴注

B.口服止血药

C.诊断性刮宫，支持疗法

D.大剂量雌激素止血并支持疗法

E.大剂量孕激素止血并支持疗法