帮我分析一下夜间血糖（图表示糖尿病患者的夜间血糖走势）---Chart Description: Type: Line chart Main Elements: - X-axis: Represents time, labeled with values like 00:40, 03:40, 06:40. The displayed range covers approximately from 00:40 to 06:40. - Y-axis: Represents a value, labeled with numbers 2, 5, 8, 11, 14. The axis likely starts from 0 or a value close to 0, extending up to 14 or higher. - Horizontal dashed lines: - A red dashed line at the Y-axis value of 5. - An orange dashed line at the Y-axis value of 11. These lines appear to represent thresholds or target ranges. - Data Line: A fluctuating line, mostly colored blue, with some segments colored red. The red segments appear when the line is below the red dashed line (value 5). - Labeled Points/Sections: - Label '1' (blue circle with number 1) points to a segment of the line that is red, below the red dashed line (value 5), around the time 01:40-02:40. - Label '2' (blue circle with number 2) points to another segment of the line that is red, below the red dashed line (value 5), around the time 03:00-04:00. - Label '3' (blue circle with number 3) points to a blue segment of the line, well above the red dashed line (value 5) and below the orange dashed line (value 11), around the time 06:40. There is a light blue circle animation around the point indicated by label 3, suggesting it might be the current or a highlighted value. The value at point 3 is approximately 8. Trend: The line starts slightly above value 8, drops below value 5 around 01:40, stays mostly below 5 with fluctuations (showing red segments) until around 04:00, then gradually increases, crossing value 5 around 04:00, and reaches approximately 8 by 06:40. Other Relevant Text: None present in the image. Question Stem: Not present in the image. Options: Not present in the image. Mathematical Formulas/Chemical Equations: Not present in the image. Table Content: Not present in the image.