The community health nurse develops a health education program about preventing the transmission of hepatitis B. The nurse evaluates that the teaching has been effective when the community residents identify which of the following activities to be high risk for acquiring hepatitis B

A. Sharing needles for drug use.
B. Ingestion of contaminated seafood.
C. Frequent use of marijuana.
D. Ingestion of large amounts of acetaminophen (Tylenol).

孕早期， * * 少量下血，逐渐增多，有血块及组织排出，妇科检查：宫口已扩张，并有部分组织已排出在 * * 。诊断为（）

A.胎漏

B.胎动不安

C.滑胎

D.堕胎

E.小产