全文获取类型
收费全文 | 24466篇 |
免费 | 1632篇 |
国内免费 | 258篇 |
专业分类
耳鼻咽喉 | 395篇 |
儿科学 | 413篇 |
妇产科学 | 323篇 |
基础医学 | 3988篇 |
口腔科学 | 434篇 |
临床医学 | 2145篇 |
内科学 | 4730篇 |
皮肤病学 | 784篇 |
神经病学 | 1997篇 |
特种医学 | 1473篇 |
外科学 | 3347篇 |
综合类 | 289篇 |
一般理论 | 4篇 |
预防医学 | 970篇 |
眼科学 | 504篇 |
药学 | 2217篇 |
2篇 | |
中国医学 | 328篇 |
肿瘤学 | 2013篇 |
出版年
2023年 | 149篇 |
2022年 | 417篇 |
2021年 | 858篇 |
2020年 | 450篇 |
2019年 | 600篇 |
2018年 | 707篇 |
2017年 | 544篇 |
2016年 | 808篇 |
2015年 | 1041篇 |
2014年 | 1200篇 |
2013年 | 1442篇 |
2012年 | 2102篇 |
2011年 | 2025篇 |
2010年 | 1207篇 |
2009年 | 1013篇 |
2008年 | 1474篇 |
2007年 | 1377篇 |
2006年 | 1291篇 |
2005年 | 1147篇 |
2004年 | 1000篇 |
2003年 | 874篇 |
2002年 | 769篇 |
2001年 | 462篇 |
2000年 | 428篇 |
1999年 | 364篇 |
1998年 | 238篇 |
1997年 | 194篇 |
1996年 | 183篇 |
1995年 | 164篇 |
1994年 | 118篇 |
1993年 | 115篇 |
1992年 | 113篇 |
1991年 | 118篇 |
1990年 | 92篇 |
1989年 | 103篇 |
1988年 | 116篇 |
1987年 | 105篇 |
1986年 | 80篇 |
1985年 | 85篇 |
1984年 | 55篇 |
1983年 | 65篇 |
1982年 | 42篇 |
1980年 | 40篇 |
1979年 | 43篇 |
1978年 | 32篇 |
1977年 | 30篇 |
1976年 | 30篇 |
1956年 | 30篇 |
1955年 | 42篇 |
1954年 | 35篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
81.
采用HPLC测定健康志愿者血浆中头孢克洛的浓度。方法简便快速,结果准确。平均回收率为102.18±4.01%,日间及日内RSD均小于6%。血药浓度-时间曲线符合一室模型。 相似文献
82.
83.
豨莶脂溶性成分的研究 总被引:7,自引:0,他引:7
从豨莶(Siegesbeckia orientalis L.)的地上部分,分离出八个化合物,其中I和I根据理化性质和光谱数据确定其结构为ent-17-acetoxy-18-isobutyryloxy-16(α)-kauran-19-oicacid(I)和ent-17-ethoxy-16(α)-kauran-19-oicacid(II),均为新化合物,分别被命为豨莶酯酸(siegesesteric acid,I)和豨莶醚酸(siegesetheric acid,I)。其余化合物分别鉴定为腺梗豨莶萜醇酸(ent-16β,17-dihydroxy-kauran-19-oicacid,II),奇任醇(kirenol,IV,β-谷甾醇葡萄糖甙(β-sitosterolglucoside,V),二十一醇(heneicosanol,VI),花生酸甲酯(methyl arachidate,VII)和β-谷甾醇(β-sitosterol,VII)。除奇任醇和β-谷甾醇外,均为首次从该植物中分得。 相似文献
84.
85.
Gi-Young Park Jong-Min Kim Sung-Il Sohn Im-Hee Shin Michael Y Lee 《Journal of rehabilitation medicine》2007,39(7):526-530
OBJECTIVE: To evaluate the ultrasonographic measurement of shoulder subluxation in patients with post-stroke hemiplegia. DESIGN: Prospective, single blind study. PATIENTS: A total of 41 patients with post-stroke hemiplegia were included (24 men and 17 women, mean age 56 years (standard deviation 11), age range 34-78 years). METHODS: Clinical evaluation of the affected shoulder was assessed using the Motricity Index scores and the Modified Ashworth Scale. Two ultrasonographic measurements were taken to check intra-rater reliability. The shoulder subluxation ratio was determined as the ratio of the radiographic vertical and horizontal distance, and the ultrasonographic lateral and anterior distances in the affected shoulder divided by that in the unaffected shoulder. RESULTS: Intraclass correlation coefficients of the repeated ultrasonographic lateral/anterior distance measurements in the unaffected and affected shoulders were 0.979/0.969 and 0.950/0.947, respectively. Ultrasonographic lateral/anterior distance ratios were negatively correlated with Motricity Index scores of the affected shoulder abduction (r = -0.490, p < 0.001/ r = -0.671, p < 0.001). Ultrasonographic anterior distance ratio was negatively correlated with Modified Ashworth Scale score of the affected shoulder (r = -0.374, p < 0.05). However, there was no correlation between radiographic distance ratios and clinical evaluation scores. CONCLUSION: We strongly recommend ultrasonography as a diagnostic tool to measure the degree of shoulder subluxation in patients with post-stroke hemiplegia. 相似文献
86.
Ryuji Takaki Tsutomu Nishiyama Masao Sekiya Shin Ishizawa Akira Junicho Yoshiyuki Fujishiro Yutaka Yabuzaki 《International journal of urology》1997,4(1):97-98
A 60-year-old Japanese man was hospitalized because of urinary leakage from the anus on October 3, 1994. Retrograde urethrography detected a fistula between the bulbous urethra and the rectum. Urethrocystoscopy revealed a tumor on the urethrorectal fistula. Tumor biopsy showed a well differentiated adenocarcinoma. Cystourethrectomy with fistulectomy, and ileal conduit urinary diversion were performed. Pathological examination revealed primary adenocarcinoma in the fistula with invasion to the prostatic urethra and bladder wall. The patient showed no evidence of a recurrence as of August, 1996. 相似文献
87.
88.
Depth of epidural space in children 总被引:1,自引:0,他引:1
M. A. Hasan MB ChB DA FRCA R. F. Howard BSc MB ChB FRCA A. R. Lloyd-Thomas MB BS FRCA 《Anaesthesia》1994,49(12):1085-1087
89.
Kyung Cheon Kim Kwang Jin Rhee Hyun Dae Shin Young Mo Kim 《Knee surgery, sports traumatology, arthroscopy》2007,15(12):1478-1481
Calcific tendinitis is a common condition with characteristic clinical and radiological findings. Although we do not know
which condition initiated the pathologic cascade, we present a rare case of calcific tendinitis of the long head of the biceps
brachii at its origin, associated with a SLAP lesion. The calcium deposit was removed and the SLAP lesion was repaired with
a suture anchor arthroscopically. 相似文献
90.