为进一步贯彻落实国务院、中央军委(71)国发13号文件精神,按照门源地区防治慢性气管炎协作小组的安排,我们于一九七五年元月中旬在东川公社的碱沟、孔家庄、尕牧农二大队及浩迈公社的头塘共四个大队,对慢性气管炎患病率做了初步调查。现将调查情况汇报于下: 一、地区情况: 门源在海北州东部,海拔在二千七百 In order to further implement the spirit of document No. 13 issued by the State Council and the Central Military Commission (CMC), in accordance with the arrangement of the Mengyuan District Co-operation Team for Chronic Gastritis Prevention, we organized the caustic ditch and hole in the Dongchuan commune in mid-January 1975 Jia Zhuang, timelagrove two grass-roots units and Haomai commune head pond a total of four brigades, the prevalence of chronic bronchitis made a preliminary investigation. The investigation is reported below: First, the regional situation: the source in the eastern state of Haibei, at an altitude of 2700