很多研究工作已经证实:一些化学物质,例如苯、苯的同系物、衍生物等,能使长期接触者的造血机能受损害,血象发生变化,如白血球减少、血小板、红血球下降等;而在血象变化之前已可发现接触者血液细胞内组成物质(各种酶、核酸的种类与含量、脂肪、醣元、无机物等)的化学活性或含量己发生了改变;细胞核内染色体可发生畸变;自细胞噬菌能力也会发生变化等等。因此有可能通过观测接触者血液细胞内部的某 Many studies have confirmed that some chemical substances, such as benzene, benzene homologues and derivatives, can impair the hematopoietic function of long-term contacts and cause changes in blood vessels, such as leukopenia, platelets and erythrocytes. In blood, Before the change, it has been found that the chemical activity or content of the constituents (various enzymes, nucleic acid types and contents, fat, glycogen, inorganic substances, etc.) in the blood cells of the contact has changed; the chromosomes in the nucleus can be distorted; Cell phagocytosis will change and so on. It is therefore possible to observe some of the cells inside the blood cells of the contact person