男性，19岁。确诊急性淋巴细胞白血病，经规范化疗后完全缓解。现该患者出现一侧睾丸无痛性肿大1周，到医院检查诊为睾丸白血病，对其正确的处理是

A．切除患侧睾丸+全身化疗

B．切除双侧睾丸+全身化疗

C．双侧睾丸放疗+全身化疗

D．患侧睾丸放疗+全身化疗

E．全身化疗

VHF Channel 6 is used exclusively for what kind of communications?（）

A.Radio checks and time checks

B.Inter-vessel safety and search and rescue

C.Working with helicopters

D.Radio direction finding