如何使用Go SDK为默认的查找器设置DynamoDB requestTimeout？

import (
    "github.com/aws/aws-sdk-go/aws"
    "github.com/aws/aws-sdk-go/aws/session"
    "github.com/aws/aws-sdk-go/service/dynamodb"
)

sess := session.Must(session.NewSessionWithOptions(session.Options{
    SharedConfigState: session.SharedConfigEnable,
}))

svc := dynamodb.New(sess)

svc.Client.Config.HTTPClient.Timeout = time.Second * 30 // 设置为30秒

input := &dynamodb.GetItemInput{
    TableName: aws.String("your_table_name"),
    Key: map[string]*dynamodb.AttributeValue{
        "your_primary_key": {
            S: aws.String("your_key_value"),
        },
    },
}

result, err := svc.GetItem(input)
if err != nil {
    // 错误处理
}

// 处理结果