答：预防石女要从病因说起，石女形成的病因多与染色体变异及孕早期用药有关，所以，在怀孕期间用药须谨慎，再者避免从事一些放射性的工作。Answer: prevent shi nu to want to speak of from pathogeny, the pathogeny of shi nu formation is more with chromosome mutation and pregnancy early use of medicine concern, so, during pregnancy use of medicine must be careful, again avoid to be engaged in a few radioactive work.