下肢静脉血栓的预防措施有哪些？

A. 雾之本境
B. 雪之本境
C. 森之本境
D. 雨之本境

A. Performing end-user training on the use of antispyware software
B. Performing virus scans
C. Scanning a network for active IP addresses and open ports on those IP addresses
D. Using password-cracking utilitie

A. 10.700
B. 0.0120
C. 1.72000
D. 0.01210