Scientists have long found that some people respond differently to certain drugs than other patients. For example, a certain type of muscle relaxant for anesthesia can prevent a specific person from breathing. Later, scientists discovered that this phenomenon is caused by such people Having specific genes. This also raises the question: Can studying genetic differences between people promote the development of higher-level treatments in medicine, that is, "tailoring drugs" based on individual genes? Scientists have identified a number of genes that interact with drugs, but it's premature to realize them. According to this text, the following is true:. ['The results of genetic research have been widely used in medicine.', 'Improper use of medicines can cause genetic mutations in the human body.', 'Human genetic differences may be reflected in drug responses.', 'The hypothesis that genes and drugs can interact has not been proven.']