患者，男性，35岁，发热伴浅表淋巴结肿大10天，乏力伴牙龈出血2天，皮肤有出血点和瘀斑，胸骨有压痛。化检Hb80g/L，WBC13.8×109/L，PLT25×109/L，临床拟诊为急性白血病。
若为急性B淋巴细胞白血病，其免疫标志是 （）
A.CD19（+）
B.CD3（+）
C.CD7（+）
D.CD13（+）
E.CD33（+）
参考答案：A
Check Engine Light As I turned from the parking lot，heading for home，I noticed a yellow light on my dashboard(仪表板)had come on.The symbol indicated that I was to ____ the engine.I noted the water temperature and the oil light ___ to see if there were problems that would ____ an overheated engine.Noting these two gauges(仪表)were okay，I ____ I could ignore the little yellow light that caused such great ___ for at least the moment. After I retrieved my owner manual(用户手册)，I ____ the check engine light comes on to indicate that there is a problem and that ____ is required.Malfunctions will often be indicated by the ____ before any problem is apparent，which may ___ more serious damage to the vehicle.This system is ___ to assist you and your technician in ____ diagnosing any malfunction. Reading the manual made me think of how we need ____in our lives to be our “check engine light”．We need to know when a(n) ____ occurs and when service is required in our lives.We need to correct our problems before serious damage surfaces.We need a light to ____ in our minds to help us avoid conflict，pain，or disaster.We need a(n) ____ to come on to tell us not to yield to temptation.We need to be ____ that we shouldn't ignore good and work to make life better for all of us. God makes a magnificent “check engine light”．He gives you an awareness to keep your pathway ____.He shows you the beauty of the earth to ____ you to him.He gives people who care about you，to help ____ your living.He has provided his word to point the ____.Lean on God to lead your pathway from the problems that could damage your living.He can repair malfunctions before they destroy your being.
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