For power demand response and distributed energy management, Alibaba Cloud offers several relevant services, including IoT Hub, Message Queue, and Data Lake Analytics. These services can be used to collect and analyze data from various sources, such as smart meters, sensors, and renewable energy systems, to optimize energy usage and reduce costs.

Regarding digital human resources, Alibaba Cloud provides a variety of HR-related solutions, including employee self-service portals, talent management systems, and recruitment platforms. These services can help streamline HR processes and improve communication between employees and managers.

In terms of pet medical clinics, Alibaba Cloud offers cloud-based electronic medical record (EMR) systems that can store and manage patient data, schedules, and medical records. This can help improve clinic efficiency and ensure patient privacy and security.

Finally, for intelligent security systems, Alibaba Cloud provides several services, including facial recognition, object detection, and video analytics. These services can be used to monitor and analyze real-time video feeds to detect potential security threats and alert authorities.