患者周××,男,53岁,某电镀厂焊接工人,1979年6月13日入院,住院号792337。患者从1971年至1979年一直从事电、气焊接工作(以电焊为主),每天8小时连续作业。蹲在槽内进行焊接,烟雾大,无防护设备。症状:以1976年开始渐头晕、头痛及双眼胀痛。渐失眠,记亿力、定向力极差,有时烦躁不安,平时沉默不语,经常出现迫害观念。发病以来食欲减退,口苦。工作时口内有甜味, Patient week × ×, male, 53 years old, a welding factory electroplating workers, admitted on June 13, 1979, hospital number 792337. Patients from 1971 to 1979 has been engaged in electrical and gas welding work (mainly to welding), 8 hours a day continuous operation. Squat in the tank for welding, smoke, no protective equipment. Symptoms: Beginning in 1976, dizziness, headache and binocular pain. Gradually insomnia, remember force, poor orientation, and sometimes restless, usually silent, often appear the concept of persecution. Since the onset of loss of appetite, mouth bitter. When the mouth has a sweet taste,