Platelet 61×10^9/L, normally 1 week to review the blood routine can be, but if the thrombocytopenia caused by chemotherapy need to be reviewed once a day. 1. The platelet count in normal human blood is (100~300)×10^9/L. Platelet 61×10^9/L belongs to the moderate reduction of platelet, which usually does not have the tendency of bleeding, and it is usually enough to check once a week. Because platelets grow faster in the body, the platelets in the body can be replaced by a new batch of platelets in about 10 days. When the platelets are low, there will be obvious changes in 7 days by giving treatments, such as oral Eltrombopag. 2. However, if the low platelet level is caused by bone marrow inhibition due to chemotherapeutic drugs, a review should be conducted once a day, so as to adjust the next treatment plan and dosage, and to provide supportive treatment such as platelet transfusion in a timely manner. How often to review the platelet lowering, according to the patient’s specific condition and the degree of platelet lowering to give a specific analysis, should be under the guidance of the physician to clarify the diagnosis, regular treatment.