Clinical Study on Nutrition Intervention in Patients With Esophageal and Gastric Cancer Treated With Chemotherapy

Inclusion Criteria: * Esophageal or gastric cancer confirmed by histology or cytology; * Age 18-75 years old, gender unlimited; * Blood routine: hemoglobin ≥90g/L, absolute neutrophil count (ANC) ≥1.5×109/L, platelets ≥100×109/L; (2) Liver and kidney function: alanine transaminase（ALT）, glutamic-oxalacetic transaminease（AST）≤2.5 times the normal upper limit (with liver metastasis ≤5 times the normal upper limit); ALP≤2.5 times the normal upper limit (≤5 times the normal upper limit for patients with liver or bone metastasis); Serum total bilirubin (TBIL) was less than 1.5 times the normal upper limit. Serum creatinine (SCr) \< 1.5 times the upper limit of normal; ③ Blood biochemistry: Serum albumin (ALB) ≥30g/L; * Predicted survival of more than 3 months; It is planned to continue chemotherapy for \>3 cycles in the hospital or outpatient department * All patients participated in this study voluntarily and signed informed consent. Exclusion Criteria: * Other tumors, including pancreatic cancer, liver cancer and other solid digestive tract tumors, colon cancer, rectal cancer and other tubular lower digestive tract tumors; * Have serious heart, lung and brain diseases; Complicated with chronic hepatitis, cirrhosis, chronic nephritis, renal insufficiency, etc. * Fever associated with infection; Have difficult-to-control diabetes or other metabolic diseases; * Patients with unstable vital signs and multiple organ failure; * The patient has poor cognitive ability and is unable to answer questions or fill out questionnaires. * The investigator believes that the subjects have a history of other serious systemic diseases or are not suitable for participating in this clinical study for other reasons