１临床资料１．１病情介绍常某，女，２１岁，外资企业印刷工，因头晕、乏力３个月于１９９７年８月１９日入院。１９９６年７月１日至１９９６年１１月２６日从事印刷工作近５个月，接触苯、二甲苯等，每日工作１０小时，车间通风不良，防护条件差，曾２次测定工作环境空... 1Clinical data 1.1 Conditions Introduction Often a female, 21 years old, a foreign-owned corporate printing worker, was admitted to hospital on August 19, 1997 because of dizziness and fatigue. From July 1, 1996 to November 26, 1996, he worked in printing for nearly five months. He was exposed to benzene, xylene, etc. He worked 10 hours a day. The workshop was poorly ventilated and had poor protection conditions. He had measured the working environment twice. ..