各位: everybody, all (guests, colleagues etc), all of you...
预防: to prevent, to take precautions against, to protect, to guard against, precautionary, prophylactic...
有效: effective, in effect, valid...
自责: to blame oneself...
主任: director, head...
批: to ascertain, (measure word for batches, lots), to act on, to criticize, to pass on...
养老院: nursing home...
