diff --git a/Falcon.SugarApi/DateTimeExtend.cs b/Falcon.SugarApi/DateTimeExtend.cs
index 992cc7e..908d3dc 100644
--- a/Falcon.SugarApi/DateTimeExtend.cs
+++ b/Falcon.SugarApi/DateTimeExtend.cs
@@ -16,8 +16,8 @@ namespace Falcon.SugarApi
         /// <param name="date">日期</param>
         /// <param name="option">查询选项</param>
         /// <returns>符合条件日期</returns>
-        public static DateTime GetDay(this DateTime date, DateOption option) {
-            date = option.RetentionTime ? date : new DateTime(date.Year, date.Month, date.Day, 0, 0, 0);
+        public static DateTime GetDay(this DateTime date,DateOption option) {
+            date = option.RetentionTime ? date : new DateTime(date.Year,date.Month,date.Day,0,0,0);
             var drt = option.DateRangeType;
             var dt = option.DateType;
             var firstDayOfWeek = option.DayOfWeek;
@@ -26,8 +26,8 @@ namespace Falcon.SugarApi
                 drt == DateRangeType.Weekly && dt == DateType.LastDay ? date.AddDays(firstDayOfWeek - date.DayOfWeek + 7) :
                 drt == DateRangeType.Monthly && dt == DateType.FirstDay ? date.AddDays(1 - date.Day) :
                 drt == DateRangeType.Monthly && dt == DateType.LastDay ? date.AddDays(1 - date.Day).AddMonths(1).AddDays(-1) :
-                drt == DateRangeType.Yearly && dt == DateType.FirstDay ? new DateTime(date.Year, 1, 1) :
-                drt == DateRangeType.Yearly && dt == DateType.LastDay ? new DateTime(date.Year, 1, 1).AddYears(1).AddDays(-1) :
+                drt == DateRangeType.Yearly && dt == DateType.FirstDay ? new DateTime(date.Year,1,1) :
+                drt == DateRangeType.Yearly && dt == DateType.LastDay ? new DateTime(date.Year,1,1).AddYears(1).AddDays(-1) :
 
                 throw new NotSupportedException("不支持这个日期查询");
         }
@@ -47,8 +47,8 @@ namespace Falcon.SugarApi
         /// <param name="date">本周的一天</param>
         /// <param name="firstDayOfWeek">默认第一天是星期几</param>
         /// <returns>本周第一天</returns>
-        public static DateTime GetFirstDayOfTheWeek(this DateTime date, DayOfWeek firstDayOfWeek = DayOfWeek.Monday) {
-            return date.GetDay(new DateOption { DateRangeType = DateRangeType.Weekly, DateType = DateType.FirstDay, DayOfWeek = firstDayOfWeek, });
+        public static DateTime GetFirstDayOfTheWeek(this DateTime date,DayOfWeek firstDayOfWeek = DayOfWeek.Monday) {
+            return date.GetDay(new DateOption { DateRangeType = DateRangeType.Weekly,DateType = DateType.FirstDay,DayOfWeek = firstDayOfWeek,});
         }
 
         /// <summary>
@@ -57,7 +57,7 @@ namespace Falcon.SugarApi
         /// <param name="date">日期</param>
         /// <returns>日期</returns>
         public static DateTime GetFirstDayOfTheMonth(this DateTime date) {
-            return date.GetDay(new DateOption { DateRangeType = DateRangeType.Monthly, DateType = DateType.FirstDay });
+            return date.GetDay(new DateOption { DateRangeType = DateRangeType.Monthly,DateType = DateType.FirstDay });
         }
 
         /// <summary>
@@ -66,7 +66,7 @@ namespace Falcon.SugarApi
         /// <param name="date">日期</param>
         /// <returns>日期</returns>
         public static DateTime GetFirstDayOfTheYear(this DateTime date) {
-            return date.GetDay(new DateOption { DateRangeType = DateRangeType.Yearly, DateType = DateType.FirstDay });
+            return date.GetDay(new DateOption { DateRangeType = DateRangeType.Yearly,DateType = DateType.FirstDay });
         }
 
         /// <summary>
@@ -75,8 +75,8 @@ namespace Falcon.SugarApi
         /// <param name="date">日期</param>
         /// <param name="firstDayOfWeek">第一天是星期几</param>
         /// <returns>第几周</returns>
-        public static int GetWeekOfTheYear(this DateTime date, DayOfWeek firstDayOfWeek = DayOfWeek.Monday) {
-            return date.GetDefaultCalendar().GetWeekOfYear(date, CalendarWeekRule.FirstDay, firstDayOfWeek);
+        public static int GetWeekOfTheYear(this DateTime date,DayOfWeek firstDayOfWeek = DayOfWeek.Monday) {
+            return date.GetDefaultCalendar().GetWeekOfYear(date,CalendarWeekRule.FirstDay,firstDayOfWeek);
         }
 
         /// <summary>
@@ -137,12 +137,24 @@ namespace Falcon.SugarApi
         public static string ToDateTime(this DateTime date) => date.ToString("yyyy-MM-dd HH:mm:ss");
 
         #endregion
+
+        /// <summary>
+        /// 时间是否处于某个时间段内
+        /// </summary>
+        /// <param name="dt">要判断的时间</param>
+        /// <param name="start">开始时间</param>
+        /// <param name="end">结束时间</param>
+        /// <returns>True是，False否</returns>
+        public static bool Between(this DateTime? dt,DateTime start,DateTime? end = null) {
+            end ??= DateTime.Now;
+            return dt > start && dt <= end;
+        }
     }
 
     /// <summary>
     /// 日期操作选项
     /// </summary>
-    public class DateOption : IOptions<DateOption>
+    public class DateOption:IOptions<DateOption>
     {
         /// <summary>
         /// 日期类型,默认第一天