diff --git a/Utils/Excel2Prompt.cs b/Utils/Excel2Prompt.cs
index 01d3608..2888aa5 100644
--- a/Utils/Excel2Prompt.cs
+++ b/Utils/Excel2Prompt.cs
@@ -50,14 +50,14 @@ public class Excel2Prompt
             var nonNullData = columnData.Where(value => value != null).ToList();
             var missingValues = columnData.Count - nonNullData.Count;
             var uniqueValues = nonNullData.Distinct().Count();
-            var sampleValues = nonNullData.Take(3).Select(value => value.ToString().Replace("\n"," ")).ToArray();
+            var sampleValues = nonNullData.Take(5).Select(value => value.ToString().Replace("\n"," ")).ToArray();                                                                                                
 
             // 自动识别数据类型
             var dataType = GetColumnDataType(nonNullData);
 
-            var prompt = $"- Column '{column.Replace("\n", " ")}'\n" +
-                            $"    - Type: {dataType}\n" +
-                            $"    - Sample values: ['{string.Join("', '", sampleValues)}']";
+            var prompt = $"- Column '{column.Replace("\n", " ")}'" +
+                            $"    - Type: {dataType}" +
+                            $"    - Sample values: ['{string.Join("','", sampleValues)}']";
                             //$"    - Unique values: {uniqueValues}\n" +
                             //$"    - Missing values: {missingValues}\n";
 
@@ -70,11 +70,11 @@ public class Excel2Prompt
 
     private static string GetColumnDataType(List<object> data)
     {
-        bool isInt = true;
-        bool isLong = true;
-        bool isDouble = true;
-        bool isDateTime = true;
-        bool isBool = true;
+        var isInt = true;
+        var isLong = true;
+        var isDouble = true;
+        var isDateTime = true;
+        var isBool = true;
 
         foreach (var item in data)
         {