therefore， look forward to receiving from you a detailed report on the situation and suggestions as to how we may help in restoring our sales to their former levelYours faithfully 尊敬的先生小姐，我们非常关。
1在完全不知道对方是谁的前提条件下，可用 Dear SirMadam 开头2写给某某委员会或者某某办公室，可用 Dear xxx CommitteeOrganisationOffice 开头3写给老师或者工作代理，可用 Dear Professor xxDear SirDear。
