The vaginal bleeding during placenta previa is characterized by（）
A. Painful vaginal bleeding
B. Vaginal bleeding volume is not proportional to the degree of anemia
C. Vaginal bleeding stops during contractions
D. Painless vaginal bleeding
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Basic pathological changes of hypertensive disorder complicating pregnancy（）
A. Severe water and sodium retention
B. Systemic arteriole spasm
C. DIC
D. High concentration of blood
The clinical manifestation of degree III placental abruption is correct（）
A. Normal fetal heart when auscultation
B. The degree of shock is not proportional to vaginal bleeding volume
C. Palpation of fetal position is clear
D. Soft abdomen
The main points of identification of tubal pregnancy and appendicitis are（）
A. Leukopenia
B. Serum HCG
C. Menopause
D. Right lower abdominal pain
The following statement about the pregnancy at the cesarean scar site is wrong（）
A. Embryo implantation in the scar of cesarean section incision in the lower uterus belongs to ectopic pregnancy
B. The main method of diagnosis is B-ultrasound
C. Early exogenous type can cause uterine rupture or hemorrhage, endogenous type has no risk
D. For early pregnancy, if there is no abdominal pain, vaginal bleeding is not much, and the pregnancy mass is not ruptured, drug treatment can be selected
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