全文获取类型
收费全文 | 1908篇 |
免费 | 187篇 |
国内免费 | 48篇 |
专业分类
耳鼻咽喉 | 18篇 |
儿科学 | 67篇 |
妇产科学 | 64篇 |
基础医学 | 305篇 |
口腔科学 | 16篇 |
临床医学 | 232篇 |
内科学 | 376篇 |
皮肤病学 | 38篇 |
神经病学 | 124篇 |
特种医学 | 76篇 |
外科学 | 335篇 |
综合类 | 51篇 |
一般理论 | 1篇 |
预防医学 | 223篇 |
眼科学 | 45篇 |
药学 | 133篇 |
肿瘤学 | 39篇 |
出版年
2022年 | 21篇 |
2021年 | 21篇 |
2020年 | 14篇 |
2019年 | 22篇 |
2018年 | 20篇 |
2017年 | 27篇 |
2016年 | 31篇 |
2015年 | 28篇 |
2014年 | 40篇 |
2013年 | 80篇 |
2012年 | 103篇 |
2011年 | 101篇 |
2010年 | 61篇 |
2009年 | 60篇 |
2008年 | 75篇 |
2007年 | 86篇 |
2006年 | 69篇 |
2005年 | 73篇 |
2004年 | 74篇 |
2003年 | 75篇 |
2002年 | 72篇 |
2001年 | 69篇 |
2000年 | 64篇 |
1999年 | 59篇 |
1998年 | 36篇 |
1997年 | 34篇 |
1996年 | 13篇 |
1995年 | 32篇 |
1994年 | 16篇 |
1993年 | 17篇 |
1992年 | 57篇 |
1991年 | 47篇 |
1990年 | 58篇 |
1989年 | 50篇 |
1988年 | 39篇 |
1987年 | 29篇 |
1986年 | 28篇 |
1985年 | 36篇 |
1984年 | 20篇 |
1983年 | 21篇 |
1982年 | 17篇 |
1981年 | 16篇 |
1980年 | 17篇 |
1979年 | 17篇 |
1978年 | 15篇 |
1976年 | 16篇 |
1975年 | 17篇 |
1973年 | 13篇 |
1969年 | 17篇 |
1968年 | 14篇 |
排序方式: 共有2143条查询结果,搜索用时 15 毫秒
91.
92.
This study was designed as a Phase II clinical trial in advanced recurrent or metastatic squamous cell carcinoma of the cervix with a combination of bleomycin (B: 10 u/m2/d) and cisplatin (P: 20 mg/m2/d) administered for five consecutive days in intravenous infusion for 7 hours and vincristine (V: 1 mg/m2) and methotrexate (M: 40 mg/m2) administered only on day one of each cycle which was repeated every 28 days up to a maximum of 6 times. Over a period of 2 years, 15 evaluable patients with measurable disease received at least 3 courses of therapy. Six had recurrent disease and nine had distant metastases. All had previous radiation therapy. There were two dropouts after the first course due to nausea and vomiting which was practically universal. Other side effects included: mild paresthesias of the extremities (89%), stomatitis (41%), diarrhea (17%), moderate pancytopenia and hypomagnesemia which was reduced from 65% to 17% when magnesium sulfate 10% was administered with cisplatin. Sixty-six percent of the evaluable patients achieved remission (7 partial and 3 complete) usually before the fourth course of therapy. The disease-free interval was of 29.7 +/- 15 weeks in all responders (40.6 +/- 15.5 weeks in complete responders). The mean survival from the start of BPVM therapy was of 55.8 +/- 33.3 weeks in responders and of only 14 +/- 2.9 weeks in nonresponders (P less than 0.01). It is concluded that BPVM is an effective combination chemotherapy in advanced squamous cell carcinoma of the cervix. These results should be confirmed in a Phase III trial. 相似文献
93.
The influence of colostrum-derived antibody to louping-ill virus on the course of experimental infection was investigated in lambs. Lambs that had high titres of antibody were refractory to infection. Lambs that had low titres of antibody did not develop a viraemia but either showed an antibody reaction or were sensitized as judged by the immune response, which was typical of an anamnestic response, after rechallenge. Animals that had no antibody 34-20 days before challenge had either no or very slight viraemia, but did develop an antibody response with titres as high as those of control lambs by day 21. Lambs that had been negative for longer periods responded in a similar fashion to controls. These findings are discussed in relation to the occurrence of disease in lambs kept in louping-ill endemic areas. It is concluded that in such areas infections of lambs are likely to be of minor importance as a cause of mortality and of little epidemiological significance. 相似文献
94.
H W Boyce 《Hospital practice (Office ed.)》1982,17(11):109-13, 117-8, 121 passim
95.
Janice H. Axelrod M.D. Rachel Fruchter Ph.D. John G. Boyce M.D. 《Gynecologic oncology》1984,18(3):359-372
Seventy-eight synchronous or metachronous tumors among 2362 patients followed by the Downstate Gynecologic Tumor Registry are reviewed. Significant synchronous tumor pairs include cervix (invasive and in situ)-ovary, cervix (in situ)-uterus, cervix (in situ)-kidney, endometrium-ovary, endometrium-rectosigmoid and ovary-breast. Significant metachronous pairs include cervix (invasive and in situ combined)-lung, cervix (invasive and in situ combined)-upper alimentary tract, and cervix (invasive)-rectosigmoid. In the case of in situ and invasive cervical cancer-lower genital tract, significance was determined for both synchronous and metachronous pairs. Long survival is an important factor in the appearance of a second tumor as demonstrated in patients with cervical carcinoma. Synchronous data prove to be valuable in assessing risk of second primaries in patients surviving for short periods. The roles of cigarette smoking, hormones, immunosuppression, radiotherapy, and screening are discussed. 相似文献
96.
97.
98.
Background
Magnetocardiography enables the precise determination of fetal cardiac time intervals (CTI) as early as the second trimester of pregnancy. It has been shown that fetal CTI change in course of gestation. The aim of this work was to investigate the dependency of fetal CTI on gestational age, gender and postnatal biometric data in a substantial sample of subjects during normal pregnancy. 相似文献99.
During the past decade, important steps have been taken globally to improve the status of children. Concurrently, significant
advances have been made toward understanding how child development is shaped by transactions between biological and environmental
influences. Despite such advances, ongoing adversities in the lives of children worldwide undermine the development of individuals
and thus the health of nations. The primary tenets of this paper are that: children continue to suffer a disproportionate
share of the world’s adversities; exposure to early adversities is not only associated with increased morbidity during childhood,
but also across the lifespan; and recent advances in understanding the operation and ontogeny of stress-response systems can
help explain how adversity is translated into lifelong effects on health. Acknowledging the long-lasting sequelae of childhood
adversity has important implications for public health and society. 相似文献
100.